Title:
ORGANIC ELECTROLUMINESCENT DEVICE AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/242584
Kind Code:
A1
Abstract:
An organic electroluminescent device and a display apparatus, relating to the technical field of organic electroluminescence. The organic electroluminescent device of the present invention comprises an organic light-emitting layer (4). The organic light-emitting layer (4) comprises a host material and a light-emitting dye; the host material is a wide-bandgap material, the singlet energy level of the host material is greater than the first singlet energy level of the light-emitting dye, and the triplet energy level of the host material is greater than or equal to the second triplet energy level of the light-emitting dye; and the second triplet energy level of the light-emitting dye is greater than or equal to the first singlet energy level of the light-emitting dye; and the light-emitting dye is a fluoroboron azamethylene bipyridyl compound or fluoroboron methylene bipyridyl compound. The device of the present invention achieves 100% exciton utilization by regulating a subject-object energy level relationship, thereby improving the efficiency and stability of the organic electroluminescent device.
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Inventors:
DUAN LIAN (CN)
HUANG TIANYU (CN)
ZHANG DONGDONG (CN)
ZHANG CHEN (CN)
LIU RUIHUAN (CN)
HUANG TIANYU (CN)
ZHANG DONGDONG (CN)
ZHANG CHEN (CN)
LIU RUIHUAN (CN)
Application Number:
PCT/CN2022/092948
Publication Date:
November 24, 2022
Filing Date:
May 16, 2022
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H01L51/50; H01L51/54
Foreign References:
| CN113437229A | 2021-09-24 | |||
| TW200523339A | 2005-07-16 | |||
| CN107507921A | 2017-12-22 | |||
| CN109346614A | 2019-02-15 | |||
| CN103183697A | 2013-07-03 |
Attorney, Agent or Firm:
BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)
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