Title:
BIPOLAR THERMALLY ACTIVATED DELAYED FLUORESCENCE MATERIAL, PREPARATION METHOD THEREFOR, AND ORGANIC ELECTROLUMINESCENT DIODE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/211122
Kind Code:
A1
Abstract:
The present invention relates to a bipolar thermally activated delayed fluorescence material, a preparation method therefor, and an organic electroluminescent diode device. The structure general formula of the bipolar thermally activated delayed fluorescence material is as shown in the following formula I: (I). In formula I above, R1 represents a chemical group as an electron acceptor, and R2 represents a chemical group as an electron donor. The present invention uses the 100% internal quantum utilization efficiency of the TADF material, and applies the bipolar thermally activated delayed fluorescence material to an organic electroluminescent diode device as a host material of a conventional fluorescent material, so that the fluorescent device can achieve a device efficiency comparable to that of a phosphorescent device of a phosphorescent heavy metal complex, the utilization rate of excitons is greatly improved, while the problems of poor color gamut and long exciton lifetime caused by using TADF material directly as a material for a light emitting layer are solved.
Inventors:
LUO JIAJIA (CN)
YAN SHUXING (CN)
YAN SHUXING (CN)
Application Number:
PCT/CN2019/085613
Publication Date:
October 22, 2020
Filing Date:
May 06, 2019
Export Citation:
Assignee:
WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECH CO LTD (CN)
International Classes:
C07D219/02; C09K11/06; H01L51/50; H01L51/54
Foreign References:
| CN108484592A | 2018-09-04 | |||
| CN103483332A | 2014-01-01 | |||
| CN107312523A | 2017-11-03 | |||
| CN108503603A | 2018-09-07 | |||
| CN108864350A | 2018-11-23 |
Other References:
IN HO LEE ET AL.: "Aggregation-induced emission type thermally activated delayed fluorescent materials for high efficiency in non-doped organic light-emitting diodes", ORGANIC ELECTRONICS, vol. 29, 8 December 2015 (2015-12-08), XP029376467, DOI: 10.1016/j.orgel.2015.11.019
Attorney, Agent or Firm:
COMIPS INTELLECTUAL PROPERTY OFFICE (CN)
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