ORGANIC MOLECULES

FOR OPTOELECTRONIC DEVICES

The invention relates to light-emitting organic molecules and their use in organic light-emitting diodes (OLEDs) and in other optoelectronic devices.

Description

The object of the present invention is to provide molecules which are suitable for use in optoelectronic devices.

This object is achieved by the invention which provides a new class of organic molecules.

According to the invention, the organic molecules are purely organic molecules, i.e. they do not contain any metal ions in contrast to metal complexes known for use in organic optoelectronic devices.

According to the present invention, the organic molecules exhibit emission maxima in the blue, sky-blue or green spectral range. The organic molecules exhibit in particular emission maxima between 420 nm and 520 nm, preferably between 440 nm and 495 nm, more preferably between 450 nm and 470 nm. The photoluminescence quantum yields of the organic molecules according to the invention are, in particular, 60 % or more. The molecules according to the invention exhibit in particular thermally activated delayed fluorescence (TADF). The use of the molecules according to the invention in an optoelectronic device, for example an organic light-emitting diode (OLED), leads to higher efficiencies of the device. Corresponding OLEDs have a higher stability than OLEDs with known emitter materials and comparable color.

The organic light-emitting molecules according to the invention comprise or consist of - a first chemical moiety comprising or consisting of a structure of Formula I,

Formula I and

- one or two second chemical moieties comprising or consisting of a structure of Formula II,

Formula II wherein the first chemical moiety is linked to each of the second chemical moiety via a single bond;

T is selected from the group consisting of

the binding site of a single bond linking the first chemical moiety to the second chemical moiety, hydrogen (H), deuterium (D), and R ¹ ;

V is selected from the group consisting of

the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

W is selected from the group consisting of

the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

X is selected from the group consisting of

the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

Y is selected from the group consisting of

the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

# represents the binding site of a single bond linking the second chemical moieties to the first chemical moiety;

Z is at each occurrence independently from another selected from the group consisting of a direct bond, CR ³ R ⁴ , C=CR ³ R ⁴ , C=0, C=NR ³ , NR ³ , O, SiR ³ R ⁴ , S, S(O) and S(0) ₂ ; R ¹ is selected from the group consisting of

CN,

CFs,

SiPh ₃ ,

GePh3, and

a third chemical moiety comprising or consisting of a structure of Formula Q:

Formula Q;

wherein

Q ¹ is selected from the group consisting of N and C-R';

Q ² is selected from the group consisting of N and C-R";

Q ³ is selected from the group consisting of N and C-R ^m ;

Q ⁵ is selected from the group consisting of N and C-R ^v ; and

$ represents the binding site of a single bond linking the third chemical moiety to the first chemical moiety;

R' is selected from the group consisting of

D,

CN,

CFs,

SiPhs,

GePh ₃ ,

F,

phenyl, which is optionally substituted with one or more substituents R ⁶ ;

triazinyl, which is optionally substituted with one or more substituents R ⁶ ;

pyridyl, which is optionally substituted with one or more substituents R ⁶ ;

pyrimidyl, which is optionally substituted with one or more substituents R ⁶ ; and

a fourth chemical moiety comprising or consisting of a structure of Formula I IQ:

Formula I IQ; § represents the binding site of a single bond linking the fourth chemical moiety to the third chemical moiety;

Z ^§ is at each occurrence independently from another selected from the group consisting of a direct bond, CR ³ R ⁴ , C=CR ³ R ⁴ , C=0, C=NR ³ , NR ³ , O, SiR ³ R ⁴ , S, S(O) and S(0) ₂ ;

R" is at each occurrence independently from another selected from the group consisting of H,

D,

CN,

CFs,

SiPh ₃ ,

GePfi3,

F,

phenyl, which is optionally substituted with one or more substituents R ⁶ ;

triazinyl, which is optionally substituted with one or more substituents R ⁶ ;

pyridyl, which is optionally substituted with one or more substituents R ⁶ ;

pyrimidyl, which is optionally substituted with one or more substituents R ⁶ ; and

a fourth chemical moiety comprising or consisting of a structure of Formula I IQ;

R ^m is at each occurrence independently from another selected from the group consisting of H,

D,

CN,

CFs,

SiPhs,

GePh ₃ ,

F,

triazinyl, which is optionally substituted with one or more substituents R ⁶ ;

pyridyl, which is optionally substituted with one or more substituents R ⁶ ;

pyrimidyl, which is optionally substituted with one or more substituents R ⁶ ; and

a fourth chemical moiety comprising or consisting of a structure of Formula I IQ;

R ^IV is at each occurrence independently from another selected from the group consisting of H,

D, CN,

CFs,

SiPh ₃ ,

GePh3,

F,

phenyl, which is optionally substituted with one or more substituents R ⁶ ;

triazinyl, which is optionally substituted with one or more substituents R ⁶ ;

pyridyl, which is optionally substituted with one or more substituents R ⁶ ;

pyrimidyl, which is optionally substituted with one or more substituents R ⁶ ;

R ^v is at each occurrence independently from another selected from the group consisting of

H,

D,

CN,

CFs,

SiPhs,

GePh ₃ ,

F,

triazinyl, which is optionally substituted with one or more substituents R ⁶ ;

pyridyl, which is optionally substituted with one or more substituents R ⁶ ;

pyrimidyl, which is optionally substituted with one or more substituents R ⁶ ;

R ^a , R ³ and R ⁴ is at each occurrence independently from another selected from the group consisting of hydrogen,

deuterium,

N(R ⁵ ) ₂ ,

OR ⁵ ,

Si(R ⁵ )s,

B(OR ⁵ ) ₂ ,

OSO ₂ R ⁵ ,

CFs,

CN,

F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ⁵ and wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C ₄ o-alkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C ₄ o-thioalkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkenyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkynyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ⁵ ; and

C3-C57-heteroaryl,

which is optionally substituted with one or more substituents R ⁵ ;

R ⁵ is at each occurrence independently from another selected from the group consisting of hydrogen,

deuterium,

N(R ⁶ ) ₂ ,

OR ⁶ ,

Si(R ⁶ ) ₃ ,

B(OR ⁶ ) ₂ ,

OSO ₂ R ⁶ ,

CF ₃ ,

CN, F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ci-C ₄ o-alkoxy,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ci-C ₄ o-thioalkoxy,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

C ₂ -C ₄ o-alkenyl,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

C ₂ -C ₄ o-alkynyl,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ⁶ ; and

C3-C57-heteroaryl,

which is optionally substituted with one or more substituents R ⁶ ;

R ^f is at each occurrence independently from another selected from the group consisting of hydrogen,

deuterium,

N(R ^5f ) ₂ , OR ^5f ,

Si(R ^5f )s,

B(OR ^5f ) ₂ ,

0S0 ₂ R ^5f ,

CFs,

CN,

F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ^5f and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ^5f C=CR ^5f , CºC, Si(R ^5f ) ₂ , Ge(R ^5f ) ₂ , Sn(R ^5f ) ₂ , C=0, C=S, C=Se, C=NR ^5f , P(=0)(R ^5f ), SO, S0 ₂ , NR ^5f , O, S or CONR ^5f ;

Ci-C4o-alkoxy,

which is optionally substituted with one or more substituents R ^5f and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ^5f C=CR ^5f , CºC, Si(R ^5f ) ₂ , Ge(R ^5f ) ₂ , Sn(R ^5f ) ₂ , C=0, C=S, C=Se, C=NR ^5f , P(=0)(R ^5f ), SO, S0 ₂ , NR ^5f , O, S or CONR ^5f ;

Ci-C40-thioalkoxy,

which is optionally substituted with one or more substituents R ^5f and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ^5f C=CR ^5f , CºC, Si(R ^5f ) ₂ , Ge(R ^5f ) ₂ , Sn(R ^5f ) ₂ , C=0, C=S, C=Se, C=NR ^5f , P(=0)(R ^5f ), SO, S0 ₂ , NR ^5f , O, S or CONR ^5f ;

C ₂ -C4o-alkenyl,

which is optionally substituted with one or more substituents R ^5f and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ^5f C=CR ^5f , CºC, Si(R ^5f ) ₂ , Ge(R ^5f ) ₂ , Sn(R ^5f ) ₂ , C=0, C=S, C=Se, C=NR ^5f , P(=0)(R ^5f ), SO, S0 ₂ , NR ^5f , O, S or CONR ^5f ;

C ₂ -C4o-alkynyl,

which is optionally substituted with one or more substituents R ^5f and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ^5f C=CR ^5f , CºC, Si(R ^5f ) ₂ , Ge(R ^5f ) ₂ , Sn(R ^5f ) ₂ , C=0, C=S, C=Se, C=NR ^5f , P(=0)(R ^5f ), SO, S0 ₂ , NR ^5f , O, S or CONR ^5f ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ^5f ; and

C3-C57-heteroaryl, which is optionally substituted with one or more substituents R ^5f .

R ^5f is at each occurrence independently from another selected from the group consisting of hydrogen,

deuterium,

N(R ⁶ ) ₂ ,

OR ⁶ ,

Si(R ⁶ ) ₃ ,

B(OR ⁶ ) ₂ ,

OSO ₂ R ⁶ ,

CFs,

CN,

F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ci-C4o-alkoxy,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ci-C ₄ o-thioalkoxy,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

C ₂ -C ₄ o-alkenyl,

which is optionally substituted with one or more substituents R ⁶ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

C ₂ -C ₄ o-alkynyl,

which is optionally substituted with one or more substituents R ⁶ and wherein one or more non-adjacent CFh-groups are optionally substituted by R ⁶ C=CR ⁶ , CºC, Si(R ⁶ ) ₂ , Ge(R ⁶ ) ₂ , Sn(R ⁶ ) ₂ , C=0, C=S, C=Se, C=NR ⁶ , P(=0)(R ⁶ ), SO, S0 ₂ , NR ⁶ , O, S or CONR ⁶ ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ⁶ ; and

C ₃ -C ₅₇ -heteroaryl,

which is optionally substituted with one or more substituents R ⁶ .

R ⁶ is at each occurrence independently from another selected from the group consisting of hydrogen,

deuterium,

OPh,

CFs,

CN,

F,

Ci-C ₅ -alkyl,

wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF ₃ , or F;

Ci-Cs-alkoxy,

wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF ₃ , or F;

Ci-Cs-thioalkoxy,

wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF ₃ , or F;

C ₂ -C ₅ -alkenyl,

wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF ₃ , or F;

C ₂ -C ₅ -alkynyl,

wherein optionally one or more hydrogen atoms are independently from each other substituted by deuterium, CN, CF ₃ , or F;

Ce-Cis-aryl,

which is optionally substituted with one or more C-i-Cs-alkyl substituents;

C ₃ -Ci ₇ -heteroaryl,

which is optionally substituted with one or more C-i-Cs-alkyl substituents;

N(C6-Ci8-aryl)2;

N(C3-Ci7-heteroaryl)2; and

N(C ₃ -Ci ₇ -heteroaryl)(C ₆ -Ci ₈ -aryl); Optionally, one or more of the substituents R ^a , R ³ , R ⁴ or R ⁵ independently from each other form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more other substituents R ^a , R ³ , R ⁴ or R ⁵ .

Optionally, one or more of the substituents R ^f or R ^5f independently from each other form a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system with one or more other substituents R ^f or R ^5f .

According to the invention, one or two substituents selected from the group consisting of T, V, W, X, and Y represent the binding site of a single bond linking the first chemical moiety and the second chemical moiety.

According to the invention, exactly one substituent selected from the group consisting of T, V, W, X, and Y is R ¹

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula la:

Formula la

wherein

R ¹ is defined as in described above;

T ^# is selected from the group consisting of the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

W ^# is selected from the group consisting of the binding site of a single bond linking the first chemical moiety to the second chemical moiety, H, D, and R ¹ ;

wherein exactly one substituent selected from the group consisting of T ^# and W ^# represents the binding site of a single bond linking the first chemical moiety and the second chemical moiety. In one embodiment, the organic molecule according to the invention comprises or consists of a structure of Formula la as shown above, wherein R ¹ is selected form the group consisting of:

CN, CF ₃ , SiPha, GePh ₃ ,

Formula A1 Formula A2 Formula A3 Formula A4 Formula A5 Formula A6

Formula A7 Formula A8 Formula A9 Formula A10 Formula A1 1 Formula A12

Formula A13 Formula A14 Formula A15 Formula A16 Formula A17 Formula A18

Formula A19 Formula A20 Formula A21 Formula A22 Formula A23 Formula A24

Formula A25 Formula A26 Formula A27

Formula B4 Formula B5 Formula B6

Formula B7 Formula B8 Formula B9

wherein & represents the binding site of a single bond linking R ¹ to the phenyl ring of the first chemical moiety as shown in formula la, wherein T ^# , W ^# , R ⁶ and R ^f are defined as above.

In another embodiment, the organic molecule according to the invention comprises or consists of a structure of Formula la:

Formula la wherein R ¹ is selected form the group consisting of:

CN, CF ₃ , SiPha, GePh ₃ ,

Formula A7 Formula A8 Formula A9

SiPh ₃

Formula A16 Formula A17 Formula A18

Formula B8 Formula B9

wherein & represents the binding site of a single bond linking R ¹ to the phenyl ring of the first chemical moiety as shown in formula la, wherein T ^# , W ^# , R ⁶ and R ^f are defined as above.

In another embodiment, the organic molecule according to the invention comprises or consists of a structure of Formula la as shown above, wherein R ¹ is selected form the group consisting of:

CN,

wherein & represents the binding site of a single bond linking R ¹ to the phenyl ring of the first chemical moiety as shown in formula la, wherein T ^# , W ^# , R ⁶ and R ^f are defined as above.

In another embodiment, the organic molecule according to the invention comprises or consists of a structure of Formula la as shown above, wherein R ¹ is selected form the group consisting of:

CN,

wherein

R ⁶ is phenyl (Ph) at each occurrence,

R ^f is H at each occurrence; and

& represents the binding site of a single bond linking R ¹ to the phenyl ring of the first chemical moiety as shown in formula la, wherein T ^# and W ^# are defined as above.

In certain embodiments, R ¹ is a third chemical moiety comprising a structure of formula Q wherein Q ¹ , Q ² , Q ³ and/or Q ⁴ is N.

In certain embodiments, the structure of formula Q comprises or consists of a structure of formula I IQ.

In one embodiment, T represents the binding site of a single bond linking the first chemical moiety to the second chemical moiety. In one embodiment, W represents the binding site of a single bond linking the first chemical moiety and to the second chemical moiety.

In one embodiment, the fourth chemical moiety comprising or consisting of a structure of Formula IIQ is identical to the one or two second chemical moieties comprising or consisting of a structure of Formula II.

In one embodiment, the fourth chemical moiety comprising or consisting of a structure of Formula IIQ is different to the one or two second chemical moieties comprising or consisting of a structure of Formula II.

In one embodiment, the organic molecule according to the invention comprises or consists of a structure of Formula III:

Formula III

wherein

wherein R ¹ is selected form the group consisting of:

Formula A1 Formula A2 Formula A3 Formula A4 Formula A5 Formula A6

Formula A7 Formula A8 Formula A9 Formula A10 Formula A11 Formula A12

Formula A13 Formula A14 Formula A15 Formula A16 Formula A17 Formula A18

Formula A19 Formula A20 Formula A21 Formula A22 Formula A23 Formula A24

Formula A25 Formula A26 Formula A27 wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula IV:

Formula IV

wherein R ¹ is selected form the group consisting of:

Formula A1 Formula A2 Formula A3 Formula A4 Formula A5 Formula A6

Formula A7 Formula A8 Formula A9 Formula A10 Formula A1 1 Formula A12

Formula A13 Formula A14 Formula A15 Formula A16 Formula A17 Formula A18

Formula A19 Formula A20 Formula A21 Formula A22 Formula A23 Formula A24

Formula A25 Formula A26 Formula A27 wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula III:

Formula III

wherein R ¹ is selected form the group consisting of:

Formula B4 Formula B5 Formula B6

Formula B7 Formula B8 Formula B9

wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula IV:

Formula IV

wherein R ¹ is selected form the group consisting of:

Formula B4 Formula B5 Formula B6

Formula B7 Formula B8 Formula B9

wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety. In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula III:

Formula III

wherein R ¹ is selected form the group consisting of:

Formula C4 Formula C5 Formula C6

Formula C7 Formula C8 Formula C9

wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula IV:

Formula IV

wherein R ¹ is selected form the group consisting of:

Formula C4 Formula C5 Formula C6

Formula C7 Formula C8 Formula C9 wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula III:

Formula III

wherein R ¹ is selected form the group consisting of:

Formula D4 Formula D5 Formula D6

Formula D7 Formula D8 Formula D9 wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula IV:

wherein R ¹ is selected form the group consisting of:

Formula D4 Formula D5 Formula D6

Formula D7 Formula D8 Formula D9 wherein & represents the binding site of a single bond linking R ¹ to the first chemical moiety.

In one embodiment, the organic molecule according to the invention comprise or consist of a structure of Formula V:

Formula V

wherein

W ^m and \J ^m is the binding site of a single bond linking the first chemical moiety to the second chemical moiety;

wherein R ¹ is selected form the group consisting of:

CN, CF ₃ .

In a further embodiment of the invention, the one or two second chemical moieties comprise or consist of a structure of Formula I la:

Formula lla wherein # and R ^a are defined as described above.

In a further embodiment of the invention, R ^a is at each occurrence independently from another selected from the group consisting of

hydrogen,

Me, Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

and N(Ph) ₂ .

In a further embodiment of the invention, R ^a is at each occurrence independently from another selected from the group consisting of

hydrogen,

Me,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph.

In a further embodiment of the invention, the one or two second chemical moieties comprise or consist of a structure of Formula lib, a structure of Formula llb-2, a structure of Formula llb-3 or a structure of Formula llb-4:

Formula lib Formula llb-2 Formula llb-3 Formula llb-4 wherein

R ^b is at each occurrence independently from another selected from the group consisting of deuterium,

N(R ⁵ ) ₂ ,

OR ⁵ ,

Si(R ⁵ ) ₃ ,

B(OR ⁵ ) ₂ ,

OSO ₂ R ⁵ ,

CFs,

CN,

F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C4o-alkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C ₄ o-thioalkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkenyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkynyl,

which is optionally substituted with one or more substituents R ⁵ and wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ⁵ ; and

C3-C57-heteroaryl,

which is optionally substituted with one or more substituents R ⁵ .

For additional variables, the aforementioned definitions apply.

In one additional embodiment of the invention, the one or two second chemical moieties comprise or consist of a structure of Formula lie, a structure of Formula llc-2, a structure of Formula llc-3 or a structure of Formula llc-4:

Formula lie Formula llc-2 Formula llc-3 Formula llc-4 wherein the aforementioned definitions apply.

In a further embodiment of the invention, R ^b is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

CN,

CFs,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

and N(Ph) ₂ . In a further embodiment of the invention, R ^b is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

CN,

CFs,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph.

In the following, examples of the second chemical moiety are shown:

For each of the above-given second chemical moieties, , the aforementioned definitions apply for #, Z, R ^a , R ³ , R ⁴ and R ⁵ .

In one embodiment, R ^a and R ⁵ is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH ₃ ) ₂ ) ('Pr), t-butyl fBu), phenyl (Ph),

triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph; and diphenylamine (NPhi2).

In a further embodiment of the invention, the fourth chemical moiety comprises or consists of a structure of Formula llq:

Formula llq wherein § and R ^f are defined as above.

In a further embodiment of the invention, R ^f is at each occurrence independently from another selected from the group consisting of

hydrogen,

Me,

CN,

CFs,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

and N(Ph) ₂ .

In a further embodiment of the invention, R ^f is at each occurrence independently from another selected from the group consisting of

hydrogen,

Me, CN,

CF ₃ ,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph.

In a further embodiment of the invention, the fourth chemical moiety comprises or consists of a structure of Formula llbq, a structure of Formula llbq-2, a structure of Formula llbq-3 or a structure of Formula llbq-4:

Formula llbq Formula llbq-2 Formula llbq-3 Formula llbq-4 wherein

R ^bq is at each occurrence independently from another selected from the group consisting of deuterium,

N(R ⁵ ) ₂ ,

OR ⁵ ,

Si(R ⁵ ) ₃ ,

B(OR ⁵ ) ₂ ,

OSO ₂ R ⁵ ,

CF ₃ ,

CN,

F,

Br,

I,

Ci-C ₄ o-alkyl,

which is optionally substituted with one or more substituents R ⁵ and wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C ₄ o-alkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ci-C ₄ o-thioalkoxy,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkenyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

C ₂ -C ₄ o-alkynyl,

which is optionally substituted with one or more substituents R ⁵ and

wherein one or more non-adjacent CH ₂ -groups are optionally substituted by R ⁵ C=CR ⁵ , CºC, Si(R ⁵ ) ₂ , Ge(R ⁵ ) ₂ , Sn(R ⁵ ) ₂ , C=0, C=S, C=Se, C=NR ⁵ , P(=0)(R ⁵ ), SO, S0 ₂ , NR ⁵ , O, S or CONR ⁵ ;

Ce-Ceo-aryl,

which is optionally substituted with one or more substituents R ⁵ ; and

C3-C57-heteroaryl,

which is optionally substituted with one or more substituents R ⁵ .

For additional variables, the aforementioned definitions apply.

In one additional embodiment of the invention, the fourth chemical moiety comprises or consists of a structure of Formula llcq, a structure of Formula llcq-2, a structure of Formula llcq-3 or a structure of Formula llcq-4:

Formula llcq Formula llcq-2 Formula llcq-3 Formula llcq-4 wherein the aforementioned definitions apply.

In a further embodiment of the invention, R ^bq is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

CN,

CFs,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

and N(Ph) ₂ .

In a further embodiment of the invention, R ^bq is at each occurrence independently from another selected from the group consisting of

Me,

'Pr,

lBu,

CN,

CF ₃ ,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph. In one embodiment of the invention, R ^bq is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ and Ph; and

triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ and Ph.

In the following, exemplary embodiments of the fourth chemical moiety are shown:

40

For $, Z ^$ , R ^f , R ³ , R ⁴ and R ^5f of the fourth chemical moiety shown above, the aforementioned definitions apply.

In one embodiment, R ^af and R ^5f is at each occurrence independently from another selected from the group consisting of hydrogen (H), methyl (Me), i-propyl (CH(CH ₃ ) ₂ ) ('Pr), t-butyl fBu), phenyl (Ph),

triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph; and diphenylamine (NPhi2). In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula ill-1 or Formula ill-2:

Formula 111-1 Formula III-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula llla-1 or Formula llla-2:

Formula llla-1 Formula llla-2 wherein

R ^c is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, carbazolyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph, triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph,

and N(Ph) ₂ .

In one additional embodiment of the invention, the organic molecules comprise or consist of a structure of Formula lllb-1 or Formula lllb-2:

Formula lllb-1 Formula lllb-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula ill-3 or Formula ill-4:

Formula ill-3 Formula ill-4

wherein the aforementioned definitions apply. In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula llla-3 or Formula llla-4:

Formula llla-3 Formula llla-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula lllb-3 or Formula lllb-4:

Formula lllb-3 Formula lllb-4 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula 111-5 or Formula 111-6:

Formula 111-5 Formula 111-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula llla-5 or Formula llla-6:

Formula llla-5 Formula llla-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula lllb-5 or Formula lllb-6:

Formula II lb-5 Formula II lb-6 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula ill-7 or Formula ill-8:

Formula 111-7 Formula 111-8 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula llla-7 or Formula II la-8:

Formula II la-7 Formula II la-8 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula lllb-7 or Formula lllb-8:

Formula lllb-7 Formula lllb-8 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-1 or Formula IV-2:

Formula IV-1 Formula IV-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-1 or Formula IVa-2:

Formula IVa-1 Formula IVa-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-1 or Formula IVb-2:

Formula IVb-1 Formula IVb-2

wherein the aforementioned definitions apply. In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-3 or Formula IV-4:

Formula IV-3 Formula IV-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-3 or Formula IVa-4:

Formula IVa-3 Formula IVa-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-3 or Formula IVb-4:

Formula IVb-3 Formula IVb-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-5 or Formula IV-6:

Formula IV-5 Formula IV-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-5 or Formula IVa-6:

Formula IVa-5 Formula IVa-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-5 or Formula IVb-6:

Formula IVb-5 Formula IVb-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-7 or Formula IV-8:

Formula IV-7 Formula IV-8

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-7 or Formula IVa-8:

Formula IVa-7 Formula IVa-8

wherein the aforementioned definitions apply. In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-7 or Formula IVb-8:

Formula IVb-7 Formula IVb-8

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-9 or Formula IV-10:

Formula IV-9 Formula IV-10

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-9 or Formula IVa-10:

Formula IVa-9 Formula IVa-10

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-9 or Formula IVb-10:

Formula IVb-9 Formula IVb-10

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-11 or Formula IV-12:

Formula IV-11 Formula IV-12 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-11 or Formula IVa-12:

Formula IVa-1 1 Formula IVa-12

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-11 or Formula IVb-12:

Formula IVb-1 1 Formula IVb-12

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IV-13 or Formula IV-14:

Formula IV-13 Formula IV-14

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVa-13 or Formula IVa-14:

Formula IVa-13 Formula IVa-14

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula IVb-13 or Formula IVb-14:

Formula IVb-13 Formula IVb-14

wherein the aforementioned definitions apply. In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula V-1 or Formula V-2:

Formula V-1 Formula V-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Va-1 or Formula Va-2:

Formula Va-1 Formula Va-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vb-1 or Formula Vb-2:

Formula Vb-1 Formula Vb-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula V-3 or Formula V-4:

Formula V-3 Formula V-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Va-3 or Formula Va-4:

Formula Va-3 Formula Va-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vb-3 or Formula Vb-4:

Formula Vb-3 Formula Vb-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI-1 or Formula VI-2:

Formula VI-1 Formula VI-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vla-1 or Formula Vla-2:

Formula Vla-1 Formula Vla-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vlb-1 or Formula Vlb-2:

Formula Vlb-1 Formula Vlb-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI-3 or Formula VI-4:

Formula VI-3 Formula VI-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vla-3 or Formula Vla-4:

Formula Vla-3 Formula Vla-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vlb-3 or Formula Vlb-4:

Formula Vlb-3 Formula Vlb-4

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI-5 or Formula VI-6:

Formula VI-5 Formula VI-6 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vla-5 or Formula Vla-6:

Formula Vla-5 Formula Vla-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vlb-5 or Formula Vlb-6:

Formula Vlb-5 Formula Vlb-6

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI-7 or Formula VI-8:

Formula VI-7 Formula VI-8 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vla-7 or Formula Vla-8:

Formula Vla-7 Formula Vla-8

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula Vlb-7 or Formula Vlb-8:

Formula Vlb-7 Formula Vlb-8

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI 1-1 or Formula VII-2:

Formula VII-1 Formula VII-2 wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI la-1 or Formula Vlla-2:

Formula Vlla-1 Formula Vlla-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, the organic molecules comprise or consist of a structure of Formula VI lb-1 or Formula Vllb-2:

Formula Vllb-1 Formula Vllb-2

wherein the aforementioned definitions apply.

In one embodiment of the invention, R ^c is at each occurrence independently from another selected from the group consisting of

Me,

iPr,

lBu,

CN,

CFs,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyridinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph,

pyrimidinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF3, and Ph, and triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ , and Ph.

In one embodiment of the invention, R ^c is at each occurrence independently from another selected from the group consisting of

Me,

'Pr,

lBu,

Ph, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ and Ph; and

triazinyl, which is optionally substituted with one or more substituents independently from each other selected from the group consisting of Me, 'Pr, ^l Bu, CN, CF ₃ and Ph.

As used throughout the present application, the terms "aryl" and "aromatic" may be understood in the broadest sense as any mono-, bi- or polycyclic aromatic moieties. Accordingly, an aryl group contains 6 to 60 aromatic ring atoms, and a heteroaryl group contains 5 to 60 aromatic ring atoms, of which at least one is a heteroatom. Notwithstanding, throughout the application the number of aromatic ring atoms may be given as subscripted number in the definition of certain substituents. In particular, the heteroaromatic ring includes one to three heteroatoms. Again, the terms“heteroaryl" and“heteroaromatic” may be understood in the broadest sense as any mono-, bi- or polycyclic hetero-aromatic moieties that include at least one heteroatom. The heteroatoms may at each occurrence be the same or different and be individually selected from the group consisting of N, O and S. Accordingly, the term "arylene" refers to a divalent substituent that bears two binding sites to other molecular structures and thereby serving as a linker structure. In case, a group in the exemplary embodiments is defined differently from the definitions given here, for example, the number of aromatic ring atoms or number of heteroatoms differs from the given definition, the definition in the exemplary embodiments is to be applied. According to the invention, a condensed (annulated) aromatic or heteroaromatic polycycle is built of two or more single aromatic or heteroaromatic cycles, which formed the polycycle via a condensation reaction.

In particular, as used throughout the present application the term aryl group or heteroaryl group comprises groups which can be bound via any position of the aromatic or heteroaromatic group, derived from benzene, naphthaline, anthracene, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, fluoranthene, benzanthracene, benzphenanthrene, tetracene, pentacene, benzpyrene, furan, benzofuran, isobenzofuran, dibenzofuran, thiophene, benzothiophene, isobenzothiophene, dibenzothiophene; pyrrole, indole, isoindole, carbazole, pyridine, quinoline, isoquinoline, acridine, phenanthridine, benzo-5, 6-quinoline, benzo-6, 7-quinoline, benzo-7, 8-quinoline, phenothiazine, phenoxazine, pyrazole, indazole, imidazole, benzimidazole, naphthoimidazole, phenanthroimidazole, pyridoimidazole, pyrazinoimidazole, quinoxalinoimidazole, oxazole, benzoxazole, napthooxazole, anthroxazol, phenanthroxazol, isoxazole, 1 ,2-thiazole, 1 ,3-thiazole, benzothiazole, pyridazine, benzopyridazine, pyrimidine, benzopyrimidine, 1 ,3,5-triazine, quinoxaline, pyrazine, phenazine, naphthyridine, carboline, benzocarboline, phenanthroline, 1 ,2,3-triazole, 1 ,2,4-triazole, benzotriazole, 1 ,2,3-oxadiazole, 1 ,2,4-oxadiazole, 1 ,2,5-oxadiazole, 1 ,2,3,4-tetrazine, purine, pteridine, indolizine und benzothiadiazole or combinations of the abovementioned groups.

As used throughout the present application the term cyclic group may be understood in the broadest sense as any mono-, bi- or polycyclic moieties.

As used throughout the present application the term alkyl group may be understood in the broadest sense as any linear, branched, or cyclic alkyl substituent. In particular, the term alkyl comprises the substituents methyl (Me), ethyl (Et), n-propyl ( ⁿ Pr), i-propyl ('Pr), cyclopropyl, n- butyl ( ⁿ Bu), i-butyl ('Bu), s-butyl ( ^s Bu), t-butyl fBu), cyclobutyl, 2-methylbutyl, n-pentyl, s-pentyl, t-pentyl, 2-pentyl, neo-pentyl, cyclopentyl, n-hexyl, s-hexyl, t-hexyl, 2-hexyl, 3-hexyl, neo-hexyl, cyclohexyl, 1 -methylcyclopentyl, 2-methylpentyl, n-heptyl, 2-heptyl, 3-heptyl, 4-heptyl, cycloheptyl, 1 -methylcyclohexyl, n-octyl, 2-ethylhexyl, cyclooctyl, 1 -bicyclo[2,2,2]octyl, 2- bicyclo[2,2,2]-octyl, 2-(2,6-dimethyl)octyl, 3-(3,7-dimethyl)octyl, adamantyl, 2,2,2-trifluorethyl, 1 , 1 -dimethyl-n-hex-1 -yl, 1 ,1 -dimethyl-n-hept-1 -yl, 1 ,1 -dimethyl-n-oct-1 -yl, 1 ,1 -dimethyl-n-dec- 1 -yl, 1 ,1 -dimethyl-n-dodec-1 -yl, 1 ,1 -dimethyl-n-tetradec-1 -yl, 1 ,1 -dimethyl-n-hexadec-1 -yl, 1 , 1 -dimethyl-n-octadec-1 -yl, 1 ,1 -diethyl-n-hex-1 -yl, 1 ,1 -diethyl-n-hept-1 -yl, 1 ,1 -diethyl-n-oct-1 - yl, 1 , 1 -diethyl-n-dec-1 -yl, 1 , 1 -diethyl-n-dodec-1 -yl, 1 , 1 -d iethyl-n-tetradec-1 -yl , 1 , 1 -diethyln-n- hexadec-1 -yl, 1 ,1 -diethyl-n-octadec-1 -yl, 1 -(n-propyl)-cyclohex-l -yl, 1 -(n-butyl)-cyclohex-l -yl, 1 -(n-hexyl)-cyclohex-1 -yl, 1 -(n-octyl)-cyclohex-1 -yl und 1 -(n-decyl)-cyclohex-1 -yl.

As used throughout the present application the term alkenyl comprises linear, branched, and cyclic alkenyl substituents. The term alkenyl group exemplarily comprises the substituents ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl or cyclooctadienyl.

As used throughout the present application the term alkynyl comprises linear, branched, and cyclic alkynyl substituents. The term alkynyl group exemplarily comprises ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl or octynyl. As used throughout the present application the term alkoxy comprises linear, branched, and cyclic alkoxy substituents. The term alkoxy group exemplarily comprises methoxy, ethoxy, n- propoxy, i-propoxy, n-butoxy, i-butoxy, s-butoxy, t-butoxy and 2-methylbutoxy.

As used throughout the present application the term thioalkoxy comprises linear, branched, and cyclic thioalkoxy substituents, in which the O of the exemplarily alkoxy groups is replaced by S.

As used throughout the present application, the terms“halogen” and“halo” may be understood in the broadest sense as being preferably fluorine, chlorine, bromine or iodine.

Whenever hydrogen is mentioned herein, it could also be replaced by deuterium at each occurrence.

It is understood that when a molecular fragment is described as being a substituent or otherwise attached to another moiety, its name may be written as if it were a fragment (e.g. naphtyl, dibenzofuryl) or as if it were the whole molecule (e.g. naphthalene, dibenzofuran). As used herein, these different ways of designating a substituent or attached fragment are considered to be equivalent.

In one embodiment, the organic molecules according to the invention have an excited state lifetime of not more than 150 ps, of not more than 100 ps, in particular of not more than 50 ps, more preferably of not more than 10 ps or not more than 7 ps in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.

In one embodiment of the invention, the organic molecules according to the invention represent thermally-activated delayed fluorescence (TADF) emitters, which exhibit a AEST value, which corresponds to the energy difference between the first excited singlet state (S1 ) and the first excited triplet state (T1 ), of less than 5000 cm ¹ , preferably less than 3000 cm ¹ , more preferably less than 1500 cm ¹ , even more preferably less than 1000 cm ¹ or even less than 500 cm ¹ .

In a further embodiment of the invention, the organic molecules according to the invention have an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.50 eV, preferably less than 0.48 eV, more preferably less than 0.45 eV, even more preferably less than 0.43 eV or even less than 0.40 eV in a film of poly(methyl methacrylate) (PMMA) with 10% by weight of organic molecule at room temperature.

In a further embodiment of the invention, the organic molecules according to the invention have a“blue material index” (BMI), calculated by dividing the photoluminescence quantum yield (PLQY) in % by the CIEy color coordinate of the emitted light, of more than 150, in particular more than 200, preferably more than 250, more preferably of more than 300 or even more than 500.

In a further embodiment of the invention, the organic molecules according to the invention have a highest occupied molecular orbital with the energy E ^homo , which is higher in energy than -6.2 eV, preferably higher in energy than -6.1 eV and even more preferably higher in energy than -6.0 eV or even -5.9 eV.

Orbital and excited state energies can be determined either by means of experimental methods or by calculations employing quantum-chemical methods, in particular density functional theory calculations. The energy of the highest occupied molecular orbital E ^HOMO is determined by methods known to the person skilled in the art from cyclic voltammetry measurements with an accuracy of 0.1 eV. The energy of the lowest unoccupied molecular orbital E ^LUMO is determined as the onset of the absorption spectrum.

The onset of an absorption spectrum is determined by computing the intersection of the tangent to the absorption spectrum with the x-axis. The tangent to the absorption spectrum is set at the low-energy side of the absorption band and at the point at half maximum of the maximum intensity of the absorption spectrum.

The energy of the first excited triplet state T 1 is determined from the onset of the emission spectrum at low temperature, typically at 77 K. For host compounds, where the first excited singlet state and the lowest triplet state are energetically separated by > 0.4 eV, the phosphorescence is usually visible in a steady-state spectrum in 2-Me-THF. The triplet energy can thus be determined as the onset of the phosphorescence spectrum. For TADF emitter molecules, the energy of the first excited triplet state T1 is determined from the onset of the delayed emission spectrum at 77 K, if not otherwise stated measured in a film of) PMMA with 10% by weight of emitter. Both for host and emitter compounds, the energy of the first excited singlet state S1 is determined from the onset of the emission spectrum, if not otherwise stated measured in a film of PMMA with 10% by weight of host or emitter compound. The onset of an emission spectrum is determined by computing the intersection of the tangent to the emission spectrum with the x-axis. The tangent to the emission spectrum is set at the high-energy side of the emission band, i.e., where the emission band rises by going from higher energy values to lower energy values, and at the point at half maximum of the maximum intensity of the emission spectrum.

A further aspect of the invention relates to a process for synthesizing organic molecules according to the invention (with an optional subsequent reaction), wherein cyanuric chloride is used as a reactant:

According to the invention, in the reaction for the synthesis of Z0 a boronic acid can be used instead of a boronic acid ester.

Typically, Grignard reaction conditions are used to generate t-butylated phenyl units on diphenyltraizine moiety. For example, preparation in-situ Grignard reagents RMgBr (R- 3,5- ditertbutylbenzene) from respective halide can be accomplished using magnesium turnings in dry tetrahydrofuran as solvent. Resulting grignard reagent reacts with cyanuric choride (2.5:1 ratio) in toluene at 1 10 °C forming 2-chloro-4,6-bis(3,5-di-tert-butylphenyl)-1 ,3,5-triazine.

In the next step Pd(PPh3)4 (tetrakis(triphenylphosphine)palladium(O) (CAS:14221-01-3) used as a Pd catalyst during addition of respective boronic ester. Other catalyst alternatives are known in the art ((tris(dibenzylideneacetone)dipalladium(O)) or [1 ,1 - bis(diphenylphosphino)ferrocene]palladium (II) dichloride). For example, the ligand may be selected from the group consisting of S-Phos ([2-dicyclohexylphoshino-2’,6’-dimethoxy-1 ,T- biphenyl]; or SPhos), X-Phos (2-(dicyclohexylphosphino)-2”,4”,6”-triisopropylbiphen yl; or XPhos), and P(Cy) ₃ (tricyclohexylphosphine). The salt is, for example, selected from tribasic potassium phosphate and potassium acetate and the solvent can be a pure solvent, such as THF/water, toluene or dioxane, or a mixture, such as toluene/dioxane/water or dioxane/toluene. A person of skill in the art can determine which Pd catalyst, ligand, salt and solvent combination will result in high reaction yields.

For the reaction of a nitrogen heterocycle in a nucleophilic aromatic substitution with an aryl halide, preferably an aryl fluoride, typical conditions include the use of a base, such as tribasic potassium phosphate or sodium hydride, for example, in an aprotic polar solvent, such as dimethyl sulfoxide (DMSO) or N,N-dimethylformamide (DMF), for example.

An alternative synthesis route comprises the introduction of a nitrogen heterocycle via copper- or palladium-catalyzed coupling to an aryl halide or to an aryl pseudohalide, preferably an aryl bromide, an aryl iodide, aryl triflate, or an aryl tosylate.

A further aspect of the invention relates to the use of an organic molecule according to the invention as a luminescent emitter or as an absorber, and/or as host material and/or as electron transport material, and/or as hole injection material, and/or as hole blocking material in an optoelectronic device.

The optoelectronic device may be understood in the broadest sense as any device based on organic materials that is suitable for emitting light in the visible or nearest ultraviolet (UV) range, i.e., in the range of a wavelength of from 380 to 800 nm. More preferably, the optoelectronic device may be able to emit light in the visible range, i.e., of from 400 to 800 nm.

In the context of such use, the optoelectronic device is more particularly selected from the group consisting of:

• organic light-emitting diodes (OLEDs),

• light-emitting electrochemical cells,

• OLED sensors, especially in gas and vapour sensors not hermetically externally shielded,

• organic diodes,

• organic solar cells, • organic transistors,

• organic field-effect transistors,

• organic lasers and

• down-conversion elements.

In a preferred embodiment in the context of such use, the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.

In the case of the use, the fraction of the organic molecule according to the invention in the emission layer in an optoelectronic device, more particularly in OLEDs, is 1 % to 99 % by weight, more particularly 5 % to 80 % by weight. In an alternative embodiment, the proportion of the organic molecule in the emission layer is 100 % by weight.

In one embodiment, the light-emitting layer comprises not only the organic molecules according to the invention but also a host material whose triplet (T1 ) and singlet (S1 ) energy levels are energetically higher than the triplet (T 1 ) and singlet (S1 ) energy levels of the organic molecule.

Compositions with at least one further emitter

One embodiment, the invention relates to a composition comprising or consisting of:

(i) 1 -50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of the organic molecule according to the invention;

(ii) 5-98 % by weight, preferably 30-93.9 % by weight, in particular 40-88% by weight, of one host compound H;

(iii) 1 -30 % by weight, in particular 1 -20 % by weight, preferably 1 -5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention; and

(iv) optionally, 0-94 % by weight, preferably 0.1 -65 % by weight, in particular 1 -50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and

(v) optionally, 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent.

The components or the compositions are chosen such that the sum of the weight of the components adds up to 100 %. In a further embodiment of the invention, the composition has an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm.

In one embodiment of the invention, the at least one further emitter molecule F is a purely organic emitter.

In one embodiment of the invention, the at least one further emitter molecule F is a purely organic TADF emitter. Purely organic TADF emitters are known from the state of the art, e.g. Wong and Zysman-Colman („Purely Organic Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes", Adv. Mater. 2017 Jun;29(22)).

In one embodiment of the invention, the at least one further emitter molecule F is a fluorescence emitter, in particular a blue, a green or a red fluorescence emitter.

In a further embodiment of the invention, the composition, containing the at least one further emitter molecule F shows an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, with a full width at half maximum of less than 0.30 eV, in particular less than 0.25 eV, preferably less than 0.22 eV, more preferably less than 0.19 eV or even less than 0.17 eV at room temperature, with a lower limit of 0.05 eV.

Composition wherein the at least one further emitter molecule F is a blue fluorescence emitter

In one embodiment of the invention, the at least one further emitter molecule F is a fluorescence emitter, in particular a blue fluorescence emitter.

In one embodiment, the at least one further emitter molecule F is a blue fluorescence emitter selected from the following group:

PCT/EP2019/054226

80 PCT/EP2019/054226

In certain embodiments, the one further emitter molecule F is a blue fluorescence emitter selected from the following group:

Composition wherein the at least one further emitter molecule F is a triplet-triplet annihilation (TTA) fluorescence emitter

In one embodiment of the invention, the at least one further emitter molecule F is a triplet-triplet annihilation (TTA) emitter. In one embodiment, F is a blue TTA emitter selected from the following group:

Composition wherein the at least one further emitter molecule F is a boron containing delayed fluorescence emitter

In one embodiment of the invention, the at least one further emitter molecule F is boron containing delayed fluorescence emitter. In one embodiment, F is a blue boron containing delayed fluorescence emitter selected from the following group:

Composition wherein the at least one further emitter molecule F is a green fluorescence emitter

In a further embodiment of the invention, the at least one further emitter molecule F is a fluorescence emitter, in particular a green fluorescence emitter.

In one embodiment, the at least one further emitter molecule F is a fluorescence emitter selected from the following group:

In a further embodiment of the invention, the composition has an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, in particular between 485 nm and 590 nm, preferably between 505 nm and 565 nm, even more preferably between 515 nm and 545 nm.

Composition wherein the at least one further emitter molecule F is a red fluorescence emitter

In a further embodiment of the invention, the at least one further emitter molecule F is a fluorescence emitter, in particular a red fluorescence emitter.

In one embodiment, the at least one further emitter molecule F is a fluorescence emitter selected from the following group: 87

88

In a further embodiment of the invention, the composition has an emission peak in the visible or nearest ultraviolet range, i.e., in the range of a wavelength of from 380 to 800 nm, in particular between 590 nm and 690 nm, preferably between 610 nm and 665 nm, even more preferably between 620 nm and 640 nm.

Light-emitting layer EML

In one embodiment, the light-emitting layer EML of an organic light-emitting diode of the invention comprises (or essentially consists of) a composition comprising or consisting of:

(i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one or more organic molecules according to the invention;

(ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of at least one host compound H; and

(iii) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and

(iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and (v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention.

Preferably, energy can be transferred from the host compound H to the one or more organic molecules of the invention, in particular transferred from the first excited triplet state T 1 (H) of the host compound H to the first excited triplet state T 1 (E) of the one or more organic molecules according to the invention and / or from the first excited singlet state S1 (H) of the host compound H to the first excited singlet state S1 (E) of the one or more organic molecules according to the invention.

In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E ^HOMO (H) in the range of from -5 eV to -6.5 eV and one organic molecule according to the invention E has a highest occupied molecular orbital HOMO(E) having an energy E ^HOMO (E), wherein E ^HOMO (H) > E ^HOMO (E).

In a further embodiment, the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy E ^LUMO (H) and the one organic molecule according to the invention E has a lowest unoccupied molecular orbital LUMO(E) having an energy E ^LUMO (E), wherein l_UMO^|_| ^ > ^LUMO^^

Light-emitting layer EML comprising at least one further host compound D

In a further embodiment, the light-emitting layer EML of an organic light-emitting diode of the invention comprises (or essentially consists of) a composition comprising or consisting of:

(i) 1 -50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one organic molecule according to the invention;

(ii) 5-99 % by weight, preferably 30-94.9 % by weight, in particular 40-89% by weight, of one host compound H; and

(iii) 0-94 % by weight, preferably 0.1 -65 % by weight, in particular 1 -50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and

(iv) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent; and

(v) optionally 0-30 % by weight, in particular 0-20 % by weight, preferably 0-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention. In one embodiment of the organic light-emitting diode of the invention, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E ^HOMO (H) in the range of from -5 eV to -6.5 eV and the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy E ^HOMO (D), wherein E ^HOMO (H) > E ^HOMO (D). The relation E ^HOMO (H) > E ^HOMO (D) favors an efficient hole transport.

In a further embodiment, the host compound H has a lowest unoccupied molecular orbital LUMO(H) having an energy E ^LUMO (H) and the at least one further host compound D has a lowest unoccupied molecular orbital LUMO(D) having an energy E ^LUMO (D), wherein E ^LUMO (H) > E ^LUMO (D). The relation E ^LUMO (H) > E ^LUMO (D) favors an efficient electron transport.

In one embodiment of the organic light-emitting diode of the invention, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E ^HOMO (H) and a lowest unoccupied molecular orbital LUMO(H) having an energy E ^LUMO (H), and

the at least one further host compound D has a highest occupied molecular orbital HOMO(D) having an energy E ^HOMO (D) and a lowest unoccupied molecular orbital LUMO(D) having an energy E ^LUMO (D),

the organic molecule E of the invention has a highest occupied molecular orbital HOMO(E) having an energy E ^HOMO (E) and a lowest unoccupied molecular orbital LUMO(E) having an energy E ^LUMO (E),

wherein

EH ^O M ^O |_| > ^ ^HOMO ^ and the difference between the energy level of the highest occupied molecular orbital HOMO(E) of organic molecule according to the invention (E ^HOMO (E)) and the energy level of the highest occupied molecular orbital HOMO(H) of the host compound H (EH ^O M ^O (H)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV; and EL ^U M ^O |_| > ^ ^LUMO ^ and the difference between the energy level of the lowest unoccupied molecular orbital LUMO(E) of organic molecule according to the invention (E ^LUMO (E)) and the lowest unoccupied molecular orbital LUMO(D) of the at least one further host compound D (EL ^U M ^O (D)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV.

Light-emitting layer EML comprising at least one further emitter molecule F

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition comprising or consisting of: (i) 1-50 % by weight, preferably 5-40 % by weight, in particular 10-30 % by weight, of one organic molecule according to the invention;

(ii) 5-98 % by weight, preferably 30-93.9 % by weight, in particular 40-88% by weight, of one host compound H;

(iii) 1-30 % by weight, in particular 1-20 % by weight, preferably 1-5 % by weight, of at least one further emitter molecule F with a structure differing from the structure of the molecules according to the invention; and

(iv) optionally 0-94 % by weight, preferably 0.1-65 % by weight, in particular 1-50 % by weight, of at least one further host compound D with a structure differing from the structure of the molecules according to the invention; and

(v) optionally 0-94 % by weight, preferably 0-65 % by weight, in particular 0-50 % by weight, of a solvent.

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition as described in Compositions with at least one further emitter, with the at least one further emitter molecule F as defined in Composition wherein the at least one further emitter molecule F is a blue fluorescence emitter.

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition as described in Compositions with at least one further emitter, with the at least one further emitter molecule F as defined in Composition wherein the at least one further emitter molecule F is a triplet-triplet annihilation (TTA) fluorescence emitter.

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition as described in Compositions with at least one further emitter, with the at least one further emitter molecule F as defined in Composition wherein the at least one further emitter molecule F is a blue boron containing delayed fluorescence emitter.

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition as described in Compositions with at least one further emitter, with the at least one further emitter molecule F as defined in Composition wherein the at least one further emitter molecule F is a green fluorescence emitter.

In a further embodiment, the light-emitting layer EML comprises (or (essentially) consists of) a composition as described in Compositions with at least one further emitter, with the at least one further emitter molecule F as defined in Composition wherein the at least one further emitter molecule F is a red fluorescence emitter. In one embodiment of the light-emitting layer EML comprising at least one further emitter molecule F, energy can be transferred from the one or more organic molecules of the invention E to the at least one further emitter molecule F, in particular transferred from the first excited singlet state S1 (E) of one or more organic molecules of the invention E to the first excited singlet state S1 (F) of the at least one further emitter molecule F.

A person skilled in the art is familiar with the selection criteria or molecular parameters (e.g., a non-zero spectral overlap integral as provided by the theory of Forster resonance energy transfer) to select a combination of the one or more organic molecules of the invention E and the at least one further emitter molecule F to achieve energy transfer from the one or more organic molecules of the invention E to the at least one further emitter molecule F.

In one embodiment of the light-emitting layer EML comprising at least one further emitter molecule F, the spectral overlap integral is non-zero, wherein the spectral overlap integral is defined as

the integral of the overlap between the normalized emission spectrum of the one or more organic molecules of the invention E and the normalized absorption spectrum of the at least one further emitter molecule F,

wherein the spectral overlap integral can take a values between zero and one, including zero and including one.

In a preferred embodiment of the light-emitting layer EML comprising at least one further emitter molecule F, the spectral overlap between integral is larger than 0.05 (corresponding to 5%), even more preferred larger than 0.10 (corresponding to 10%), even more preferred larger than 0.15 (corresponding to 15%).

In one embodiment, the first excited singlet state S1 (H) of one host compound H of the light- emitting layer is higher in energy than the first excited singlet state S1 (E) of the one or more organic molecules of the invention E: S1 (H) > S1 (E), and the first excited singlet state S1 (H) of one host compound H is higher in energy than the first excited singlet state S1 (F) of the at least one emitter molecule F: S1 (H) > S1 (F).

In one embodiment, the first excited triplet state T1 (H) of one host compound H is higher in energy than the first excited triplet state T1 (E) of the one or more organic molecules of the invention E: T1 (H) > T1 (E), and the first excited triplet state T 1 (H) of one host compound H is higher in energy than the first excited triplet state T 1 (F) of the at least one emitter molecule F: T 1 (H) > T1 (F).

In one embodiment, the first excited singlet state S1 (E) of the one or more organic molecules of the invention E is higher in energy than the first excited singlet state S1 (F) of the at least one emitter molecule F: S1 (E) > S1 (F).

In one embodiment, the first excited triplet state T 1 (E) of the one or more organic molecules E of the invention is higher in energy than the first excited singlet state T 1 (F) of the at least one emitter molecule F: T1 (E) > T1 (F).

In one embodiment, the first excited triplet state T 1 (E) of the one or more organic molecules E of the invention is higher in energy than the first excited singlet state T 1 (F) of the at least one emitter molecule F: T1 (E) > T1 (F), wherein the absolute value of the energy difference between T 1 (E) and T 1 (F) is larger than 0.3 eV, preferably larger than 0.4 eV, or even larger than 0.5 eV.

In one embodiment, the host compound H has a highest occupied molecular orbital HOMO(H) having an energy E ^HOMO (H) and a lowest unoccupied molecular orbital LUMO(H) having an energy E ^LUMO (H), and

the one organic molecule according to the invention E has a highest occupied molecular orbital HOMO(E) having an energy E ^HOMO (E) and a lowest unoccupied molecular orbital LUMO(E) having an energy E ^LUMO (E),

the at least one further emitter molecule F has a highest occupied molecular orbital HOMO(F) having an energy E ^HOMO (F) and a lowest unoccupied molecular orbital LUMO(E) having an energy E ^LUMO (F),

wherein

EH ^O M ^O |_| > ^H ^O M ^O ^ and the difference between the energy level of the highest occupied molecular orbital HOMO(F) of the at least one further emitter molecule (E ^HOMO (F)) and the energy level of the highest occupied molecular orbital HOMO(H) of the host compound H (EH ^O M ^O (H)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV; and EL ^U M ^O |_| > EL ^U M ^O ^ and the difference between the energy level of the lowest unoccupied molecular orbital LUMO(F) of the at least one further emitter molecule (E ^LUMO (F)) and the lowest unoccupied molecular orbital LUMO(E) of the one organic molecule according to the invention (E ^LUMO (E)) is between -0.5 eV and 0.5 eV, more preferably between -0.3 eV and 0.3 eV, even more preferably between -0.2 eV and 0.2 eV or even between -0.1 eV and 0.1 eV. Optoelectronic devices

In a further aspect, the invention relates to an optoelectronic device comprising an organic molecule or a composition as described herein, more particularly in the form of a device selected from the group consisting of organic light-emitting diode (OLED), light-emitting electrochemical cell, OLED sensor, more particularly gas and vapour sensors not hermetically externally shielded, organic diode, organic solar cell, organic transistor, organic field-effect transistor, organic laser, and down-conversion element.

In a preferred embodiment, the optoelectronic device is a device selected from the group consisting of an organic light emitting diode (OLED), a light emitting electrochemical cell (LEC), and a light-emitting transistor.

In one embodiment of the optoelectronic device of the invention, the organic molecule according to the invention is used as emission material in a light-emitting layer EML.

In one embodiment of the optoelectronic device of the invention, the light-emitting layer EML consists of the composition according to the invention described herein.

When the optoelectronic device is an OLED, it may, for example, exhibit the following layer structure:

1 . substrate

2. anode layer A

3. hole injection layer, HIL

4. hole transport layer, HTL

5. electron blocking layer, EBL

6. emitting layer, EML

7. hole blocking layer, HBL

8. electron transport layer, ETL

9. electron injection layer, EIL

10. cathode layer, wherein the OLED comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer type defined above. Furthermore, the optoelectronic device may optionally comprise one or more protective layers protecting the device from damaging exposure to harmful species in the environment including, exemplarily moisture, vapor and/or gases.

In one embodiment of the invention, the optoelectronic device is an OLED, which exhibits the following inverted layer structure:

1 . substrate

2. cathode layer

3. electron injection layer, EIL

4. electron transport layer, ETL

5. hole blocking layer, HBL

6. emitting layer, B

7. electron blocking layer, EBL

8. hole transport layer, HTL

9. hole injection layer, HIL

10. anode layer A wherein the OLED with an inverted layer structure comprises each layer only optionally, different layers may be merged and the OLED may comprise more than one layer of each layer types defined above.

In one embodiment of the invention, the optoelectronic device is an OLED, which may exhibit stacked architecture. In this architecture, contrary to the typical arrangement, where the OLEDs are placed side by side, the individual units are stacked on top of each other. Blended light may be generated with OLEDs exhibiting a stacked architecture, in particular white light may be generated by stacking blue, green and red OLEDs. Furthermore, the OLED exhibiting a stacked architecture may optionally comprise a charge generation layer (CGL), which is typically located between two OLED subunits and typically consists of a n-doped and p-doped layer with the n-doped layer of one CGL being typically located closer to the anode layer.

In one embodiment of the invention, the optoelectronic device is an OLED, which comprises two or more emission layers between anode and cathode. In particular, this so-called tandem OLED comprises three emission layers, wherein one emission layer emits red light, one emission layer emits green light and one emission layer emits blue light, and optionally may comprise further layers such as charge generation layers, blocking or transporting layers between the individual emission layers. In a further embodiment, the emission layers are adjacently stacked. In a further embodiment, the tandem OLED comprises a charge generation layer between each two emission layers. In addition, adjacent emission layers or emission layers separated by a charge generation layer may be merged.

The substrate may be formed by any material or composition of materials. Most frequently, glass slides are used as substrates. Alternatively, thin metal layers (e.g., copper, gold, silver or aluminum films) or plastic films or slides may be used. This may allow a higher degree of flexibility. The anode layer A is mostly composed of materials allowing to obtain an (essentially) transparent film. As at least one of both electrodes should be (essentially) transparent in order to allow light emission from the OLED, either the anode layer A or the cathode layer C is transparent. Preferably, the anode layer A comprises a large content or even consists of transparent conductive oxides (TCOs). Such anode layer A may exemplarily comprise indium tin oxide, aluminum zinc oxide, fluorine doped tin oxide, indium zinc oxide, PbO, SnO, zirconium oxide, molybdenum oxide, vanadium oxide, wolfram oxide, graphite, doped Si, doped Ge, doped GaAs, doped polyaniline, doped polypyrrol and/or doped polythiophene.

Preferably, the anode layer A (essentially) consists of indium tin oxide (ITO). The roughness of the anode layer A caused by the transparent conductive oxides (TCOs) may be compensated by using a hole injection layer (HIL). Further, the HIL may facilitate the injection of quasi charge carriers (i.e., holes) in that the transport of the quasi charge carriers from the TCO to the hole transport layer (HTL) is facilitated. The hole injection layer (HIL) may comprise poly-3, 4-ethylendioxy thiophene (PEDOT), polystyrene sulfonate (PSS), M0O2, V2O5, CuPC or Cul, in particular a mixture of PEDOT and PSS. The hole injection layer (HIL) may also prevent the diffusion of metals from the anode layer A into the hole transport layer (HTL). The HIL may exemplarily comprise PEDOT:PSS (poly-3, 4-ethylendioxy thiophene: polystyrene sulfonate), PEDOT (poly-3, 4-ethylendioxy thiophene), mMTDATA (4,4',4"-tris[phenyl(m- tolyl)amino]triphenylamine), Spiro-TAD (2,2',7,7'-tetrakis(n,n-diphenylamino)-9,9’- spirobifluorene), DNTPD (N1 ,N T-(biphenyl-4,4'-diyl)bis(N1 -phenyl-N4,N4-di-m-tolylbenzene- 1 ,4-diamine), NPB (N,N'-nis-(1 -naphthalenyl)-N,N'-bis-phenyl-(1 ,T-biphenyl)-4,4'-diamine), NPNPB (N,N'-diphenyl-N,N'-di-[4-(N,N-diphenyl-amino)phenyl]benzidi ne), MeO-TPD (N,N,N',N'-tetrakis(4-methoxyphenyl)benzidine), HAT-CN (1 ,4, 5, 8, 9,1 1 -hexaazatriphenylen- hexacarbonitrile) and/or Spiro-NPD (N,N'-diphenyl-N,N'-bis-(1 -naphthyl)-9,9'-spirobifluorene- 2, 7-diamine).

Adjacent to the anode layer A or hole injection layer (HIL) typically a hole transport layer (HTL) is located. Herein, any hole transport compound may be used. Exemplarily, electron-rich heteroaromatic compounds such as triarylamines and/or carbazoles may be used as hole transport compound. The HTL may decrease the energy barrier between the anode layer A and the light-emitting layer EML. The hole transport layer (HTL) may also be an electron blocking layer (EBL). Preferably, hole transport compounds bear comparably high energy levels of their triplet states T 1. Exemplarily the hole transport layer (HTL) may comprise a star- shaped heterocycle such as tris(4-carbazoyl-9-ylphenyl)amine (TCTA), poly-TPD (poly(4- butylphenyl-diphenyl-amine)), [alpha]-NPD (poly(4-butylphenyl-diphenyl-amine)), TAPC (4,4 - cyclohexyliden-bis[N,N-bis(4-methylphenyl)benzenamine]), 2-TNATA (4,4',4"-tris[2- naphthyl(phenyl)amino]triphenylamine), Spiro-TAD, DNTPD, NPB, NPNPB, MeO-TPD, HAT- CN and/or TrisPcz (9,9'-diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bic arbazole). In addition, the HTL may comprise a p-doped layer, which may be composed of an inorganic or organic dopant in an organic hole-transporting matrix. Transition metal oxides such as vanadium oxide, molybdenum oxide or tungsten oxide may exemplarily be used as inorganic dopant. Tetrafluorotetracyanoquinodimethane (F4-TCNQ), copper-pentafluorobenzoate (Cu(l)pFBz) or transition metal complexes may exemplarily be used as organic dopant.

The EBL may, for example, comprise mCP (1 ,3-bis(carbazol-9-yl)benzene), TCTA, 2-TNATA, mCBP (3,3-di(9H-carbazol-9-yl)biphenyl), SiMCP (3,5-Di(9H-carbazol-9- yl)phenyl]triphenylsilane), DPEPO, tris-Pcz, CzSi (9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)- 9H-carbazole), and/or DCB (N,N'-dicarbazolyl-1 ,4-dimethylbenzene).

Adjacent to the hole transport layer (HTL), the light-emitting layer EML is typically located. The light-emitting layer EML comprises at least one light emitting molecule. Particular, the EML comprises at least one light emitting molecule according to the invention. In one embodiment, the light-emitting layer comprises only the organic molecules according to the invention. Typically, the EML additionally comprises one or more host material. Exemplarily, the host material is selected from CBP (4,4'-Bis-(N-carbazolyl)-biphenyl), mCP, mCBP Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), CzSi, SimCP ([3,5-Di(9H-carbazol-9- yl)phenyl]triphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), DPEPO (bis[2- (diphenylphosphino)phenyl] ether oxide), 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3- (dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H- carbazole, T2T (2,4,6-tris(biphenyl-3-yl)-1 ,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1 ,3,5- triazine) and/or TST (2, 4, 6-tris(9,9'-spirobifluorene-2-yl)-1 ,3,5-triazine). The host material typically should be selected to exhibit first triplet (T 1 ) and first singlet (S1 ) energy levels, which are energetically higher than the first triplet (T1 ) and first singlet (S1 ) energy levels of the organic molecule. In one embodiment of the invention, the EML comprises a so-called mixed-host system with at least one hole-dominant host and one electron-dominant host. In a particular embodiment, the EML comprises exactly one light emitting molecule species according to the invention and a mixed-host system comprising T2T as electron-dominant host and a host selected from CBP, mCP, mCBP, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]- 9H-carbazole, 9-[3-(dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2- dibenzofuranyl)phenyl]-9H-carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H- carbazole as hole-dominant host. In a further embodiment the EML comprises 50-80 % by weight, preferably 60-75 % by weight of a host selected from CBP, mCP, mCBP, 9-[3- (dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3-(dibenzofuran-2-yl)phenyl]-9H-carbazole, 9-[3- (dibenzothiophen-2-yl)phenyl]-9H-carbazole, 9-[3,5-bis(2-dibenzofuranyl)phenyl]-9H- carbazole and 9-[3,5-bis(2-dibenzothiophenyl)phenyl]-9H-carbazole; 10-45 % by weight, preferably 15-30 % by weight of T2T and 5-40 % by weight, preferably 10-30 % by weight of light emitting molecule according to the invention.

Adjacent to the light-emitting layer EML an electron transport layer (ETL) may be located. Herein, any electron transporter may be used. Exemplarily, compounds poor of electrons such as, e.g., benzimidazoles, pyridines, triazoles, oxadiazoles (e.g., 1 ,3,4-oxadiazole), phosphinoxides and sulfone, may be used. An electron transporter may also be a star-shaped heterocycle such as 1 , 3, 5-tri(1 -phenyl-1 H-benzo[d]imidazol-2-yl)phenyl (TPBi). The ETL may comprise NBphen (2,9-bis(naphthalen-2-yl)-4,7-diphenyl-1 ,10-phenanthroline), Alq3 (Aluminum-tris(8-hydroxyquinoline)), TSP01 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), BPyTP2 (2,7-di(2,2'-bipyridin-5-yl)triphenyle), Sif87 (dibenzo[b,d]thiophen-2-yltriphenylsilane), Sif88 (dibenzo[b,d]thiophen-2-yl)diphenylsilane), BmPyPhB (1 ,3-bis[3,5-di(pyridin-3- yl)phenyl]benzene) and/or BTB (4, 4'-bis-[2-(4,6-diphenyl-1 , 3, 5-triazinyl)]-1 ,1 -biphenyl). Optionally, the ETL may be doped with materials such as Liq. The electron transport layer (ETL) may also block holes or a holeblocking layer (HBL) is introduced.

The HBL may, for example, comprise BCP (2, 9-dimethyl-4,7-diphenyl-1 ,10-phenanthroline = Bathocuproine), BAIq (bis(8-hydroxy-2-methylquinoline)-(4-phenylphenoxy)aluminum) , NBphen (2, 9-bis(naphthalen-2-yl)-4,7-diphenyl-1 ,10-phenanthroline), Alq3 (Aluminum-tris(8- hydroxyquinoline)), TSP01 (diphenyl-4-triphenylsilylphenyl-phosphinoxide), T2T (2,4,6- tris(biphenyl-3-yl)-1 ,3,5-triazine), T3T (2,4,6-tris(triphenyl-3-yl)-1 ,3,5-triazine), TST (2,4,6- tris(9,9'-spirobifluorene-2-yl)-1 ,3,5-triazine), and/or TCB/TCP (1 ,3,5-tris(N-carbazolyl)benzol/ 1 ,3,5-tris(carbazol)-9-yl) benzene). A cathode layer C may be located adjacent to the electron transport layer (ETL). For example, the cathode layer C may comprise or may consist of a metal (e.g., Al, Au, Ag, Pt, Cu, Zn, Ni, Fe, Pb, LiF, Ca, Ba, Mg, In, W, or Pd) or a metal alloy. For practical reasons, the cathode layer may also consist of (essentially) non-transparent metals such as Mg, Ca or Al. Alternatively or additionally, the cathode layer C may also comprise graphite and or carbon nanotubes (CNTs). Alternatively, the cathode layer C may also consist of nanoscalic silver wires.

An OLED may further, optionally, comprise a protection layer between the electron transport layer (ETL) and the cathode layer C (which may be designated as electron injection layer (EIL)). This layer may comprise lithium fluoride, cesium fluoride, silver, Liq (8- hydroxyquinolinolatolithium), LhO, BaF ₂ , MgO and/or NaF.

Optionally, also the electron transport layer (ETL) and/or a hole blocking layer (HBL) may comprise one or more host compounds.

In order to modify the emission spectrum and/or the absorption spectrum of the light-emitting layer EML further, the light-emitting layer EML may further comprise one or more further emitter molecule F. Such an emitter molecule F may be any emitter molecule known in the art. Preferably such an emitter molecule F is a molecule with a structure differing from the structure of the molecules according to the invention. The emitter molecule F may optionally be a TADF emitter. Alternatively, the emitter molecule F may optionally be a fluorescent and/or phosphorescent emitter molecule which is able to shift the emission spectrum and/or the absorption spectrum of the light-emitting layer EML. Exemplarily, the triplet and/or singlet excitons may be transferred from the emitter molecule according to the invention to the emitter molecule F before relaxing to the ground state SO by emitting light typically red-shifted in comparison to the light emitted by emitter molecule E. Optionally, the emitter molecule F may also provoke two-photon effects (i.e., the absorption of two photons of half the energy of the absorption maximum).

Optionally, an optoelectronic device (e.g., an OLED) may exemplarily be an essentially white optoelectronic device. Exemplarily such white optoelectronic device may comprise at least one (deep) blue emitter molecule and one or more emitter molecules emitting green and/or red light. Then, there may also optionally be energy transmittance between two or more molecules as described above.

As used herein, if not defined more specifically in the particular context, the designation of the colors of emitted and/or absorbed light is as follows: violet: wavelength range of >380-420 nm;

deep blue: wavelength range of >420-480 nm;

sky blue: wavelength range of >480-500 nm;

green: wavelength range of >500-560 nm;

yellow: wavelength range of >560-580 nm;

orange: wavelength range of >580-620 nm;

red: wavelength range of >620-800 nm.

With respect to emitter molecules, such colors refer to the emission maximum. Therefore, exemplarily, a deep blue emitter has an emission maximum in the range of from >420 to 480 nm, a sky-blue emitter has an emission maximum in the range of from >480 to 500 nm, a green emitter has an emission maximum in a range of from >500 to 560 nm, a red emitter has an emission maximum in a range of from >620 to 800 nm.

A further embodiment of the present invention relates to an OLED, which emits light with Cl Ex and CIEy color coordinates close to the CIEx (= 0.131 ) and CIEy (= 0.046) color coordinates of the primary color blue (CIEx = 0.131 and CIEy = 0.046) as defined by ITU-R Recommendation BT.2020 (Rec. 2020) and thus is suited for the use in Ultra High Definition (UHD) displays, e.g. UHD-TVs. In this context, the term“close to” refers to the ranges of CIEx and CIEy coordinates provided at the end of this paragraph. In commercial applications, typically top-emitting (top-electrode is transparent) devices are used, whereas test devices as described throughout the present application represent bottom-emitting devices (bottom- electrode and substrate are transparent). The CIEy color coordinate of a blue device can be reduced by up to a factor of two, when changing from a bottom- to a top-emitting device, while the CIEx remains nearly unchanged (Okinaka et al. doi:10.1002/sdtp.10480). Accordingly, a further embodiment of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.02 and 0.30, preferably between 0.03 and 0.25, more preferably between 0.05 and 0.20 or even more preferably between 0.08 and 0.18 or even between 0.10 and 0.15 and / or a CIEy color coordinate of between 0.00 and 0.45, preferably between 0.01 and 0.30, more preferably between 0.02 and 0.20 or even more preferably between 0.03 and 0.15 or even between 0.04 and 0.10.

A further embodiment of the present invention relates to an OLED, which emits light with CIEx and CIEy color coordinates close to the CIEx (= 0.170) and CIEy (= 0.797) color coordinates of the primary color green (CIEx = 0.170 and CIEy = 0.797) as defined by ITU-R Recommendation BT.2020 (Rec. 2020) and thus is suited for the use in Ultra High Definition (UHD) displays, e.g. UHD-TVs. In this context, the term“close to” refers to the ranges of CIEx and CIEy coordinates provided at the end of this paragraph. In commercial applications, typically top-emitting (top-electrode is transparent) devices are used, whereas test devices as used throughout the present application represent bottom-emitting devices (bottom-electrode and substrate are transparent). The CIEy color coordinate of a blue device can be reduced by up to a factor of two, when changing from a bottom- to a top-emitting device, while the Cl Ex remains nearly unchanged (Okinaka et al. doi:10.1002/sdtp.10480). Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a Cl Ex color coordinate of between 0.06 and 0.34, preferably between 0.07 and 0.29, more preferably between 0.09 and 0.24 or even more preferably between 0.12 and 0.22 or even between 0.14 and 0.19 and / or a CIEy color coordinate of between 0.75 and 1 .20, preferably between 0.76 and 1 .05, more preferably between 0.77 and 0.95 or even more preferably between 0.78 and 0.90 or even between 0.79 and 0.85.

A further embodiment of the present invention relates to an OLED, which emits light with Cl Ex and CIEy color coordinates close to the CIEx (= 0.708) and CIEy (= 0.292) color coordinates of the primary color red (CIEx = 0.708 and CIEy = 0.292) as defined by ITU-R Recommendation BT.2020 (Rec. 2020) and thus is suited for the use in Ultra High Definition (UHD) displays, e.g. UHD-TVs. In this context, the term“close to” refers to the ranges of CIEx and CIEy coordinates provided at the end of this paragraph. In commercial applications, typically top-emitting (top-electrode is transparent) devices are used, whereas test devices as used throughout the present application represent bottom-emitting devices (bottom-electrode and substrate are transparent). The CIEy color coordinate of a blue device can be reduced by up to a factor of two, when changing from a bottom- to a top-emitting device, while the CIEx remains nearly unchanged (Okinaka et al. doi:10.1002/sdtp.10480). Accordingly, a further aspect of the present invention relates to an OLED, whose emission exhibits a CIEx color coordinate of between 0.60 and 0.88, preferably between 0.61 and 0.83, more preferably between 0.63 and 0.78 or even more preferably between 0.66 and 0.76 or even between 0.68 and 0.73 and / or a CIEy color coordinate of between 0.25 and 0.70, preferably between 0.26 and 0.55, more preferably between 0.27 and 0.45 or even more preferably between 0.28 and 0.40 or even between 0.29 and 0.35.

Accordingly, a further aspect of the present invention relates to an OLED, which exhibits an external quantum efficiency at 1000 cd/m ² of more than 8%, more preferably of more than 10%, more preferably of more than 13%, even more preferably of more than 15% or even more than 20% and/or exhibits an emission maximum between 420 nm and 500 nm, preferably between 430 nm and 490 nm, more preferably between 440 nm and 480 nm, even more preferably between 450 nm and 470 nm and/or exhibits a LT80 value at 500 cd/m ² of more than 100 h, preferably more than 200 h, more preferably more than 400 h, even more preferably more than 750 h or even more than 1000 h.

The optoelectronic device, in particular the OLED according to the present invention can be produced by any means of vapor deposition and/ or liquid processing. Accordingly, at least one layer is

prepared by means of a sublimation process,

prepared by means of an organic vapor phase deposition process,

prepared by means of a carrier gas sublimation process,

solution processed or printed.

The methods used to produce the optoelectronic device, in particular the OLED according to the present invention are known in the art. The different layers are individually and successively deposited on a suitable substrate by means of subsequent deposition processes. The individual layers may be deposited using the same or differing deposition methods.

Vapor deposition processes exemplarily comprise thermal (co)evaporation, chemical vapor deposition and physical vapor deposition. For active matrix OLED display, an AMOLED backplane is used as substrate. The individual layer may be processed from solutions or dispersions employing adequate solvents. Solution deposition process exemplarily comprise spin coating, dip coating and jet printing. Liquid processing may optionally be carried out in an inert atmosphere (e.g., in a nitrogen atmosphere) and the solvent may optionally be completely or partially removed by means known in the state of the art.

Examples

General synthesis scheme I

General procedure for synthesis AAV1\

1-Bromo-3,5-tert-butylbenzene (2.50 equivalents, CAS: 22385-77-9) in dry THF is added dropwise to activated magnesium turnings suspended in dry THF under N ₂ atmosphere. After addition, the mixture is refluxed for a few hours until 1-bromo-3,5-tert-butylbenzene (CAS: 22385-77-9) is consumed completely and the mixture becomes dark brown. The resulting Grignard reagent is slowly added to cyanuric chloride (1.00 equivalent in dry toluene, CAS: 108-77-0) at room temperature (RT) (the cyanuric chloride was previously prepared in another flask). After addition, the mixture is refluxed overnight and cooled to RT. The crude product 2- chloro-4,6-bis(3,5-di-tert-butylphenyl)-1 ,3,5-triazine is extracted with DCM/brine and recrystallized from EtOH/DCM (20:1 ) to yield a white solid.

General procedure for synthesis AAV2\

THF, water

70 °C

2-chloro-4,6-bis(3,5-di-tert-butylphenyl)-1 ,3,5-triazine (1.00 equivalents) R ¹ -fluoro- phenylboronic ester (1.00-1.50 equivalents), Pd(PPh3)4

(tetrakis(triphenylphosphine)palladium(O) (CAS:14221-01-3, 0.10 equivalents) and potassium carbonate (3.00 equivalents) are stirred overnight under nitrogen atmosphere in THF/Water (3:1 ) at 70 °C. After cooling down to room temperature (RT), the reaction mixture is extracted with ethyl acetate/brine. The organic phases are collected, the organic solvent is removed and the crude product Z0 is purified by flash chromatography or by recrystallization.

General procedure for synthesis AAV3:

Z0 (1 equivalent), the corresponding donor molecule D-H (n equivalents, i.e. 1 equivalent or 2 equivalents, depending on the integer n) and tribasic potassium phosphate (3.00 equivalents) are suspended under nitrogen atmosphere in DMSO and stirred at 120 °C for 12 to 16 hours. Subsequently, the reaction mixture is poured into an excess of water in order to precipitate the product. The precipitate is filtered off, washed with water and dried under vacuum. The crude product is purified by recrystallization or by flash chromatography. The product is obtained as a solid.

In particular, the donor molecule D-H is a 3,6-substituted carbazole (e.g., 3,6- dimethylcarbazole, 3,6-diphenylcarbazole, 3,6-di-tert-butylcarbazole), a 2,7-substituted carbazole (e.g., 2,7-dimethylcarbazole, 2,7-diphenylcarbazole, 2,7-di-tert-butylcarbazole), a 1 ,8-substituted carbazole (e.g., 1 ,8-dimethylcarbazole, 1 ,8-diphenylcarbazole, 1 ,8-di-tert- butylcarbazole), a 1 -substituted carbazole (e.g., 1 -methylcarbazole, 1 -phenylcarbazole, 1 -tert- butylcarbazole), a 2-substituted carbazole (e.g., 2-methylcarbazole, 2-phenylcarbazole, 2-tert- butylcarbazole), or a 3-substituted carbazole (e.g., 3-methylcarbazole, 3-phenylcarbazole, 3- tert-butylcarbazole).

For example, a halogen-substituted carbazole, particularly 3-bromocarbazole, can be used as D-H.

In a subsequent reaction, a boronic acid ester functional group or boronic acid functional group may be, for example, introduced at the position of the one or more halogen substituents, which was introduced via D-H, to yield the corresponding carbazol-3-ylboronic acid ester or carbazol- 3-ylboronic acid, e.g., via the reaction with bis(pinacolato)diboron (CAS No. 73183-34-3). Subsequently, one or more substituents R ^a may be introduced at the position of the boronic acid ester group or the boronic acid group via a coupling reaction with the corresponding halogenated reactant R ^a -Hal, preferably R ^a -CI and R ^a -Br. Alternatively, one or more substituents R ^a may be introduced at the position of the one or more halogen substituents, which was introduced via D-H, via the reaction with a boronic acid of the substituent R ^a [R ^a -B(OH)2] or a corresponding boronic acid ester.

HPLC-MS:

HPLC-MS spectroscopy is performed on a HPLC by Agilent (1 100 series) with MS-detector (Thermo LTQ XL). A reverse phase column 4,6mm x 150mm, particle size 5,0pm from Waters (without pre-column) is used in the HPLC. The HPLC-MS measurements are performed at room temperature (rt) with the solvents acetonitrile, water and THF in the following concentrations:

From a solution with a concentration of 0.5mg/ml an injection volume of 15 pL is taken for the measurements. The following gradient is used:

Flow rate [ml/min] time [min] A[%] B[%] C[%]

3 0 40 50 10

3 10 15 25 60

3 14 15 25 60

3 14.01 40 50 10

3 18 40 50 10

3 19 40 50 10

Ionisation of the probe is performed by APCI (atmospheric pressure chemical ionization).

Cyclic voltammetry

Cyclic voltammograms are measured from solutions having concentration of 10 ³ mol/l of the organic molecules in dichloromethane or a suitable solvent and a suitable supporting electrolyte (e.g. 0.1 mol/l of tetrabutylammonium hexafluorophosphate). The measurements are conducted at room temperature under nitrogen atmosphere with a three-electrode assembly (Working and counter electrodes: Pt wire, reference electrode: Pt wire) and calibrated using FeCp2/FeCp2 ⁺ as internal standard. The HOMO data was corrected using ferrocene as internal standard against SCE.

Density functional theory calculation

Molecular structures are optimized employing the BP86 functional and the resolution of identity approach (Rl). Excitation energies are calculated using the (BP86) optimized structures employing Time-Dependent DFT (TD-DFT) methods. Orbital and excited state energies are calculated with the B3LYP functional. Def2-SVP basis sets (and a m4-grid for numerical integration are used. The Turbomole program package is used for all calculations.

Photophysical measurements

Sample pretreatment: Spin-coating

Apparatus: Spin150, SPS euro.

The sample concentration is 10 mg/ml, dissolved in a suitable solvent.

Program: 1 ) 3 s at 400 U/min; 20 s at 1000 U/min at 1000 Upm/s. 3) 10 s at 4000 U/min at 1000 Upm/s. After coating, the films are tried at 70 °C for 1 min.

Photoluminescence spectroscopy and TCSPC ( Time-correlated single-photon counting) Steady-state emission spectroscopy is measured by a Horiba Scientific, Modell FluoroMax-4 equipped with a 150 W Xenon-Arc lamp, excitation- and emissions monochromators and a Hamamatsu R928 photomultiplier and a time-correlated single-photon counting option. Emissions and excitation spectra are corrected using standard correction fits.

Excited state lifetimes are determined employing the same system using the TCSPC method with FM-2013 equipment and a Horiba Yvon TCSPC hub.

Excitation sources:

NanoLED 370 (wavelength: 371 nm, puls duration: 1 ,1 ns)

NanoLED 290 (wavelength: 294 nm, puls duration: <1 ns)

SpectraLED 310 (wavelength: 314 nm)

SpectraLED 355 (wavelength: 355 nm).

Data analysis (exponential fit) is done using the software suite DataStation and DAS6 analysis software. The fit is specified using the chi-squared-test.

Photoluminescence quantum yield measurements

For photoluminescence quantum yield (PLQY) measurements an Absolute PL Quantum Yield Measurement C9920-03G system ( Hamamatsu Photonics) is used. Quantum yields and CIE coordinates are determined using the software U6039-05 version 3.6.0.

Emission maxima are given in nm, quantum yields F in % and CIE coordinates as x,y values. PLQY is determined using the following protocol:

1 ) Quality assurance: Anthracene in ethanol (known concentration) is used as reference

2) Excitation wavelength: the absorption maximum of the organic molecule is determined and the molecule is excited using this wavelength

3) Measurement Quantum yields are measured for sample of solutions or films under nitrogen atmosphere. The yield is calculated using the equation:

wherein n _Photon denotes the photon count and Int. the intensity.

Production and characterization of optoelectronic devices

OLED devices comprising organic molecules according to the invention can be produced via vacuum-deposition methods. If a layer contains more than one compound, the weight- percentage of one or more compounds is given in %. The total weight-percentage values amount to 100 %, thus if a value is not given, the fraction of this compound equals to the difference between the given values and 100%.

The not fully optimized OLEDs are characterized using standard methods and measuring electroluminescence spectra, the external quantum efficiency (in %) in dependency on the intensity, calculated using the light detected by the photodiode, and the current. The OLED device lifetime is extracted from the change of the luminance during operation at constant current density. The LT50 value corresponds to the time, where the measured luminance decreased to 50 % of the initial luminance, analogously LT80 corresponds to the time point, at which the measured luminance decreased to 80 % of the initial luminance, LT 95 to the time point, at which the measured luminance decreased to 95 % of the initial luminance etc.

Accelerated lifetime measurements are performed (e.g. applying increased current densities). Exemplarily LT80 values at 500 cd/m ² are determined using the following equation: cd ²

500

m ² wherein Lo denotes the initial luminance at the applied current density.

The values correspond to the average of several pixels (typically two to eight), the standard deviation between these pixels is given. Comparison Example 1C

Example 1C was synthesized according to AAV1 (62% yield),

AAV2 (65% yield), wherein a boronic ester of 9,9'-(5-Bromo-1 ,3-phenylene)bis(9H-carbazole) (CAS:750573-24-1 ): (9,9'-(5-(4,4,5,5-tetramethyl-1 ,2,3-dioxaborolan-2-yl)- 1 ,3- phenylene)bis(9H-carbazole)) was used.

MS (HPLC-MS), m/z (retention time): 863.66(35.86 min).

Figure 1 depicts the emission spectrum of example 1C (10% by weight in PMMA). The emission maximum is at 433 nm. The photoluminescence quantum yield (PLQY) is 27%, the full width at half maximum is 0.45 eV and the emission lifetime is 631 ps.

Example 1

Example 1 was synthesized according to AAV1 (62% yield) and AAV2 (62-% yield), AAV3 (21 % yield)

MS (HPLC-MS), m/z (retention time): 723.55 (22.20 min).

Figure 2 depicts the emission spectrum of example 1 (10% by weight in PMMA). The emission maximum is at 451 nm. The photoluminescence quantum yield (PLQY) is 67%, the full width at half maximum is 0.43 eV and the emission lifetime is 42 ps. Example 2

Example 2 was synthesized according to AAV1 (62% yield) and AAV2 (63% yield), AAV3 (60% yield)

MS (HPLC-MS), m/z (retention time): 940.51 ( 28.80 min).

Figure 3 depicts the emission spectrum of example 2 (10% by weight in PMMA). The emission maximum is at 450 nm. The photoluminescence quantum yield (PLQY) is 76% the full width at half maximum is 0.41 eV. The resulting CIE _X coordinate is determined at 0.16 and the emission lifetime is 251 ps.

Example 3

Example 3 was synthesized according to AAV1 (62% yield) and according to AAV2 (30% yield) to yield the transition product:

The transition product reacts further with (2-(carbazole-9H)phenyl) pinacol ester according to AAV2 to yield:

AAV3 (64% yield)

MS (HPLC-MS), m/z (retention time): 1030.15 (30.59 min).

Figure 4 depicts the emission spectrum of example 3 (10% by weight in PMMA). The emission maximum is at 457 nm. The photoluminescence quantum yield (PLQY) is 69%, the full width at half maximum is 0.43 eV. The resulting CIE _X coordinate is determined at 0.16 and the emission lifetime is 94 ps.

Examples Energy Transfer

To test whether the organic molecules according to the invention can be employed in an EML of an OLED device that contains an additional emitter molecule F, films consisting of compositions of one organic molecule according to the invention and an additional emitter molecule F were prepared and investigated via photoluminescence spectroscopy. Sufficient energy transfer from the organic molecule according to the invention to the additional emitter molecule F occurs, resulting in emission from the additional emitter molecule F. Only emission from the additional emitter molecule F is observed. Example ETO

Figure 5 depicts the emission spectrum of example ETO (1 % by weight in PMMA), which is employed as the additional emitter molecule F in the following examples ET1 to ET4.

The emission maximum is at 456 nm. The full width at half maximum is 0.18 eV. The resulting CIEy coordinate is determined at 0.09.

Comparison Example ET1

Figure 6 depicts the emission spectrum of example ETO (1 % by weight in example 1 C). The emission maximum is at 493 nm. The full width at half maximum is 0.49 eV. The resulting CIE _y coordinate is determined at 0.30.

By comparing the photoluminescence spectrum of the emitter molecule ETO in PMMA (1 % by weight) to the photoluminescence spectrum of ETO (1 % by weight in example 1 C) undesired contributions to the spectrum can be determined. In particular, an additional emission is observed in the photoluminescence spectrum of ETO (1 % by weight in example 1 C) with an emission maximum at approximately 492 nm, compared to example ETO (1 % by weight in PMMA). This additional emission leads to a reduction of the colorfastness, i.e. not only emission from the additional molecule F is observed.

Example ET2

Figure 7 depicts the emission spectrum of example ETO (1 % by weight in example 1 ). The emission maximum is at 459 nm. The full width at half maximum is 0.31 eV. The resulting CIE _y coordinate is determined at 0.22. Example ET3

Figure 8 depicts the emission spectrum of example ETO (1 % by weight in example 2). The emission maximum is at 452 nm. The full width at half maximum is 0.28 eV. The resulting CIE _y coordinate is determined at 0.15.

Example ET4

Figure 9 depicts the emission spectrum of example ETO (1 % by weight in example 3). The emission maximum is at 454 nm. The full width at half maximum is 0.29 eV. The resulting CIE _y coordinate is determined at 0.19.

Example 4

Example 4 was synthesized similarly as described for Example 3 according to:

wherein, 2-chloro-4,6-bis(3,5-di-tert-butylphenyl)-1 ,3,5-triazine (1 .00 equivalents), 2’-fluoro-5’- (4,4,5,5-tetramethyM ,2,3-dioxaborolan-2-yl)[1 ,1’-biphenyl]-2-carbazole R04, Pd(dppf)Cl2 (0.05 equivalent, CAS: 72287-26-4) and potassium acetate (3.00 equivalents) are stirred under nitrogen atmosphere in a toluene/water mixture (ratio of 10:1 ) at reflux for 20 hours. Subsequently, the reaction mixture is cooled down to room temperature and extracted with ethyl acetate/brine. The organic phase is collected, washed with brine and dried over MgS0 ₄ . The organic solvent is removed and the crude product is purified by hot wash with EtOH. The product is obtained as a white solid with a yield of 36 %.

Subsequently, AAV3 is performed to obtain example 4 with a yield of 77%.

MS (HPLC-MS), m/z (retention time): 939.68 (33.59 min).

Figure 10 depicts the emission spectrum of example 4 (10 % by weight in PMMA). The emission maximum (A _max ) is at 459 nm. The photoluminescence quantum yield (PLQY) is 78%, the full width at half maximum (FWHM) is 0.42 eV and the emission lifetime is 123 ps.

Example 5

Example 5 was synthesized according to AAV1 (62% yield) and according to AAV2 (30% yield) to yield the transition product TP1 :

The transition product is reacted further according to:

wherein Transition product TP1 (1 .00 equivalents), bis(pinacolato)diboron_(1.5 equivalents, CAS: 73183-34-3), Pd ₂ (dba) ₃ (0.01 equivalent, CAS: 51364-51 -3), X-Phos (0.04 equivalents, CAS: 564483-18-7) and potassium acetate (3.0 equivalents) are stirred under nitrogen atmosphere toluene 1 10 °C overnight . Subsequently, the reaction mixture is cooled down to room temperature and extracted with ethyl acetate/brine. The organic phase is collected, washed with brine and dried over MgS0 ₄ . The organic solvent is removed and crude product purified by recrystallization from hot EtOH. TP2 is obtained with a yield of 80%.

TP2 is further reacted with 2-chloro-4,6-diphenylpyrimidine (1.0 equivalents, CAS: 2915-16-4), tris(dibenzylideneacetone)dipalladium(0) (Pd ₂ (dba) ₃ (0.03 equivalents; CAS 51364-51 -3), Tricyclohexylphosphine (PCy ₃ ; 0.07 equivalents, CAS 2622-14-2) and potassium phosphate tribasic (K3PO4, 1 .7 equivalents). The reaction mixture is stirred under nitrogen atmosphere in a dioxane/toluen e/water (6/1/1 ) mixture at 100 °C overnight. After cooling down to room temperature (RT) the reaction mixture is extracted with DCM/brine. The organic phases are collected, washed with brine and dried over MgS0 ₄ . The organic solvent is removed, the crude product was washed with cyclohexane and recrystallized from EtOH (Yield: 98%).

Subsequently, AAV3 is performed to obtain example 5 with a yield of 95% yield.

MS (HPLC-MS), m/z (retention time): 1081 .68 (40%) (28.26 min). Example 6

Example 6 was synthesized as described in the synthesis of example 5,

and AAV3 (83% yield), wherein 3-phenyl-9H-carbazole (CAS 103012-26-6) was used as reactant.

MS (HPLC-MS), m/z (retention time): 1004.73 (40%), (26.50 min):

Figure 12 depicts the emission spectrum of example 6 (10% by weight in PMMA). The emission maximum is at 459 nm. The photoluminescence quantum yield (PLQY) is 65%, the full width at half maximum is 0.40 eV, and the emission lifetime is 236 ps. The CIE _X value is 0.16 and CIE _y value is 0.17.

Device D1

Example 4 was tested in an OLED-device D1 with the following layer structure:

For D1 an external quantum efficiency (EQE) at 1000 cd/m ² of 10.4 ± 0.1 % was determined. The emission maximum is at 464 nm, CIEx is 0.14 and CIEy 0.17 at 5.9 V.

Additional Examples of Organic Molecules of the Invention

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PCT/EP2019/054226

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WO 2019/162332 147

WO 2019/162332 149

Figures

Figure 1 Emission spectrum of example 1C (10% by weight) in PMMA. Figure 2 Emission spectrum of example 1 (10% by weight) in PMMA.

Figure 3 Emission spectrum of example 2 (10% by weight) in PMMA.

Figure 4 Emission spectrum of example 3 (10% by weight) in PMMA.

Figure 5 Emission spectrum of example ET0 (1 % by weight) in PMMA. Figure 6 Emission spectrum of example ET0 (1 % by weight) in example 1C. Figure 7 Emission spectrum of example ET0 (1 % by weight) in example 1. Figure 8 Emission spectrum of example ET0 (1 % by weight) in example 2. Figure 9 Emission spectrum of example ET0 (1 % by weight) in example 3. Figure 10 Emission spectrum of example 4 (10% by weight) in PMMA.

Figure 1 1 Emission spectrum of example 5 (10% by weight) in PMMA.

Figure 12 Emission spectrum of example 6 (10% by weight) in PMMA.