Title:
OLED DEVICE AND PREPARATION METHOD THEREFOR, DISPLAY SUBSTRATE, AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/062705
Kind Code:
A1
Abstract:
An OLED device, comprising: an anode (100), a cathode (300), and a first light-emitting unit (200) located between the anode (100) and the cathode (300). The first light-emitting unit (200) comprises a hole functional unit (210) and a light-emitting layer (220) that are sequentially stacked. The hole functional unit (210) is located between the anode (100) and the light-emitting layer (220). The hole functional unit (210) comprises a first functional layer (211) for transporting electrons, a second functional layer (212) for injecting holes, and a third functional layer (213) for transporting holes, which are sequentially stacked. The first functional layer (211) comprises an electron transport material on which one or more among an active metal and an active metal compound is doped. The energy level difference between the LUMO energy level of the second functional layer (212) and the HOMO energy level of the third functional layer (213) is less than 1 eV.
Inventors:
JIAO ZHIQIANG (CN)
ZHANG LILEI (CN)
ZHANG LILEI (CN)
Application Number:
PCT/CN2021/110763
Publication Date:
March 31, 2022
Filing Date:
August 05, 2021
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
International Classes:
H01L51/50
Foreign References:
| CN112164753A | 2021-01-01 | |||
| CN105140258A | 2015-12-09 | |||
| CN104882555A | 2015-09-02 | |||
| CN101371619A | 2009-02-18 | |||
| CN101297018A | 2008-10-29 | |||
| CN111668379A | 2020-09-15 | |||
| KR20180013604A | 2018-02-07 | |||
| EP2752903A1 | 2014-07-09 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
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