Title:
ORGANIC ELECTROLUMINESCENCE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2020/184219
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an organic EL element that is equipped with a capping layer configured from two layers, which are a first capping layer and a second capping layer having a higher refractive index than the first capping layer, with a view to achieving an improved light extraction efficiency as compared with an organic EL element formed from a unilaminar capping layer. The present invention pertains to an organic electroluminescence element which at least has an anode, a hole transport layer, a light-emitting layer, an electron transport layer, a cathode, and a capping layer in this order, wherein: the capping layer is structured to have two layers consisting of a first capping layer and a second capping layer; within a wavelength range of 450-650 nm, the second capping layer has a greater refractive index than the first capping layer; and the second capping layer comprises an arylamine compound having a specific structure.
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Inventors:
HIRAYAMA YUTA (JP)
MOCHIZUKI SHUNJI (JP)
YAMAMOTO TAKESHI (JP)
HAYASHI SHUICHI (JP)
PARK YOUNG-HWAN (KR)
MOCHIZUKI SHUNJI (JP)
YAMAMOTO TAKESHI (JP)
HAYASHI SHUICHI (JP)
PARK YOUNG-HWAN (KR)
Application Number:
PCT/JP2020/008306
Publication Date:
September 17, 2020
Filing Date:
February 28, 2020
Export Citation:
Assignee:
HODOGAYA CHEMICAL CO LTD (JP)
SFC CO LTD (KR)
SFC CO LTD (KR)
International Classes:
H05B33/02; H01L51/50
Domestic Patent References:
| WO2017183625A1 | 2017-10-26 | |||
| WO2015001726A1 | 2015-01-08 |
Foreign References:
| JP2015092485A | 2015-05-14 | |||
| CN109400485A | 2019-03-01 | |||
| CN109400520A | 2019-03-01 | |||
| CN107674060A | 2018-02-09 | |||
| US5792557A | 1998-08-11 | |||
| US5639914A | 1997-06-17 |
Other References:
PROCEEDINGS OF THE 9TH MEETING OF THE JAPAN SOCIETY OF APPLIED PHYSICS, 2001, pages 55 - 61
APPL. PHYS. LETT., vol. 78, 2001, pages 544
APPL. PHYS. LETT., vol. 82, 2003, pages 466
AUST. J. CHEM., vol. 45, 1992, pages 371
J. ORG. CHEM., vol. 60, 1995, pages 7508
SYNTH. COMMUN., vol. 11, 1981, pages 513
APPL. PHYS. LET., vol. 98, 2011, pages 083302
See also references of EP 3941159A4
APPL. PHYS. LETT., vol. 78, 2001, pages 544
APPL. PHYS. LETT., vol. 82, 2003, pages 466
AUST. J. CHEM., vol. 45, 1992, pages 371
J. ORG. CHEM., vol. 60, 1995, pages 7508
SYNTH. COMMUN., vol. 11, 1981, pages 513
APPL. PHYS. LET., vol. 98, 2011, pages 083302
See also references of EP 3941159A4
Attorney, Agent or Firm:
SHOWA INTERNATIONAL PATENT FIRM (JP)
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