Title:
ORGANIC ELECTROLUMINESCENT DEVICE AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/217600
Kind Code:
A1
Abstract:
An organic electroluminescent device, comprising an anode (2), a cathode (11), a light-emitting layer (7) provided between the anode (2) and the cathode (11), and an auxiliary light-emitting layer (6) located on the side of the light-emitting layer (7) facing the anode (2). The auxiliary light-emitting layer (6) comprises a first host material and a first fluorescent guest material. The light-emitting layer (7) comprises a second host material, a TADF material, and a second fluorescent guest material. The first host material and the first fluorescent guest material satisfy: S1(B)-T1(B)>0.2eV; S1(B)>S1(C); T1(B)>T1(C); and ||HOMO(B)-LUMO(C)|-S1(C)|≤0.2eV, wherein the lowest singlet energy of the first host material is S1(B), and the lowest triplet energy thereof is T1(B); the lowest singlet energy of the first fluorescent guest material is S1(C), and the lowest triplet energy thereof is T1(C); the highest occupied molecular orbital energy level of the first host material is HOMO(B); and the lowest unoccupied molecular orbital energy level of the first fluorescent guest material is LUMO(C).
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Inventors:
ZHANG XIAOJIN (CN)
YANG HUIYUN (CN)
WU YONG (CN)
WANG DAN (CN)
YANG HUIYUN (CN)
WU YONG (CN)
WANG DAN (CN)
Application Number:
PCT/CN2021/087868
Publication Date:
October 20, 2022
Filing Date:
April 16, 2021
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
International Classes:
H01L51/50
Foreign References:
| CN111653679A | 2020-09-11 | |||
| CN112447921A | 2021-03-05 | |||
| CN112234150A | 2021-01-15 | |||
| CN109599493A | 2019-04-09 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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