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Title:
LIGHT-EMITTING ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/210345
Kind Code:
A1
Abstract:
A light-emitting element comprises an anode, a cathode which faces the anode, a light-emitting layer which is arranged between the anode and the cathode and contains a light-emitting material, a hole transporting layer which is arranged between the light-emitting layer and the anode and contains an organic hole transporting material, a hole injection layer which is arranged between the anode and the hole transporting layer and contains an inorganic hole transporting material, and an organic layer which is arranged between the hole transporting layer and the hole injection layer. The organic layer contains an aromatic compound which has a functional group R1 that can chemically bind to the inorganic hole transporting material, a functional group R2 that contains, at a terminal thereof, a hydrogen atom or at least one functional group selected from a nitro group, a cyano group, a halogen group, a carboxyl group, an aldehyde group, a hydroxyl group, an ester bond having 1 to 3 carbon atoms, an alkyl group having 1 to 3 carbon atoms and an amino group, and an aromatic ring to which R1 and R2 are bonded.

Inventors:
NAKA TAKAYUKI
Application Number:
PCT/JP2021/011428
Publication Date:
October 21, 2021
Filing Date:
March 19, 2021
Export Citation:
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Assignee:
SHARP KK (JP)
International Classes:
H01L51/50; H05B33/14
Domestic Patent References:
WO2019207029A12019-10-31
WO2019223163A12019-11-28
Foreign References:
JP2019522367A2019-08-08
CN101132054A2008-02-27
KR20120039940A2012-04-26
JP2019153710A2019-09-12
JP2010123716A2010-06-03
JP2007103174A2007-04-19
JP2008091180A2008-04-17
Attorney, Agent or Firm:
INOUE Tomoya (JP)
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