Title:
ORGANIC ELECTROLUMINESCENT DEVICE AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/257817
Kind Code:
A1
Abstract:
Provided are an organic electroluminescent device and a display apparatus, relating to the technical field of organic electroluminescence. The organic electroluminescent device comprises an organic light-emitting layer. The organic light-emitting layer comprises a host material and a doped dye. The host material is a wide-band gap material. The organic light-emitting layer is composed of a phosphorescent sensitizer and a host light-emitting material doped with a resonance-type thermally activated delayed fluorescent material guest. The device uses a method of co-doping a phosphorescent material and the resonance-type thermally activated delayed fluorescent material in the host, thereby achieving a 100% exciton utilization rate, so that the prepared OLEDs have the characteristics of high efficiency and low roll-off.
Inventors:
DUAN LIAN (CN)
HONG XIANGCHEN (CN)
ZHANG YUEWEI (CN)
ZHANG DONGDONG (CN)
LI GUOMENG (CN)
CAI MINGHAN (CN)
HONG XIANGCHEN (CN)
ZHANG YUEWEI (CN)
ZHANG DONGDONG (CN)
LI GUOMENG (CN)
CAI MINGHAN (CN)
Application Number:
PCT/CN2022/096255
Publication Date:
December 15, 2022
Filing Date:
May 31, 2022
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H01L51/54; H01L51/50
Foreign References:
| CN113540371A | 2021-10-22 | |||
| CN112820834A | 2021-05-18 | |||
| CN111153919A | 2020-05-15 | |||
| CN112174992A | 2021-01-05 | |||
| CN111333671A | 2020-06-26 | |||
| CN110407859A | 2019-11-05 | |||
| CN110407858A | 2019-11-05 | |||
| CN110335951A | 2019-10-15 | |||
| CN109817837A | 2019-05-28 | |||
| JP2016092320A | 2016-05-23 | |||
| CN109192874A | 2019-01-11 |
Attorney, Agent or Firm:
BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)
Download PDF: