Title:
LIGHT-EMITTING LAYER, LIGHT-EMITTING DEVICE AND DISPLAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/201725
Kind Code:
A1
Abstract:
Provided are a light-emitting layer, a light-emitting device and a display device, relating to the technical field of displays. The light-emitting layer comprises: a host material, comprising a hole-type host material and an electron-type host material, the host material being configured to be capable of forming an exciplex under the action of external energy; and a guest material doped in the host material, the absolute value of the difference value between the energy value of the highest occupied molecular orbital HOMO of the hole-type host material and the energy value of the lowest unoccupied molecular orbital LUMO of the electron-type host material satisfying: 2.4eV≤|HOMO-LUMO|≤3.2eV. The light-emitting layer, by means of matching energy levels of the hole-type host material and the electron-type host material, can decrease the density of the triplet excitons, decrease a TTA effect, and increase a turn-on voltage, thereby effectively improving an inter-pixel crosstalk condition.
Inventors:
LIU YANG (CN)
QIU LIXIA (CN)
SUN YUQIAN (CN)
QIU LIXIA (CN)
SUN YUQIAN (CN)
Application Number:
PCT/CN2022/088572
Publication Date:
October 26, 2023
Filing Date:
April 22, 2022
Export Citation:
Assignee:
BOE TECHNOLOGY GROUP CO LTD (CN)
International Classes:
H01L51/50; H01L51/54
Foreign References:
| CN113969168A | 2022-01-25 | |||
| CN107200743A | 2017-09-26 | |||
| CN105895811A | 2016-08-24 | |||
| CN112909197A | 2021-06-04 | |||
| US20170125715A1 | 2017-05-04 | |||
| CN113823749A | 2021-12-21 | |||
| CN102683615A | 2012-09-19 |
Attorney, Agent or Firm:
BEIJING RUN ZEHENG INTELLECTUAL PROPERTY LAW FIRM (CN)
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