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US 11,380,847 B2Granted
Thermally activated delayed fluorescent material, preparation method thereof, and electroluminescent device
AssigneeWuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsJiajia Luo, Shuxing Yan
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Abstract
The present invention provides at thermally activated delayed fluorescent material, including a compound composed of an acceptor A and a donor D, the compound having a following structural formula of Formula 1: D-A Formula 1, wherein the receptor A is selected from any one of following structural formulas: and the donor D has a following structural formula:
Claims8
An electroluminescent device, comprising:
- a base layer;
- a hole injection layer disposed on the base layer;
- a hole transport layer disposed on the hole injection layer;
- a light-emitting layer disposed on the hole transport layer;
- an electron transport layer disposed on the light-emitting layer;
- and
- a cathode layer disposed on the electron transport layer,
- wherein the light-emitting layer comprises a thermally activated delayed fluorescent material, the thermally activated delayed fluorescent material comprises a compound composed of an acceptor A and a donor D, the compound having a following structural formula of Formula 1:
- D-A Formula 1,
- wherein the acceptor A is selected from any one of following structural formulas:
- and the donor D has a following structural formula:
- wherein the base layer is made of a material comprising ITO, the injection layer is made of a material comprising 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazabenzophenanthrene;
- the hole transport layer is made of a material comprising 4,4′,4″-tris(carbazole-9-yl)triphenylamine;
- the electron transport layer is made of a material comprising 1,3,5-tris(3-(3-pyridyl)phenyl)benzene(Tm3PyPB);
- and the cathode layer is made of a material comprising lithium fluoride and aluminum.
12 more elements
A method of preparing a thermally activated delayed fluorescent material, comprising the following steps:
- Step S1:
- performing a reaction between a compound of A-X and a compound of D-H in a solution containing an alkali with catalyst at a first temperature for a first duration to obtain a reaction solution, wherein X is a halogen, A is selected from any one of the following structural formulas:
- and D has a following structural formula:
- Step S2:
- cooling the reaction solution to a second temperature to obtain a mixture;
- and
- Step S3:
- separating the thermally activated delayed fluorescent material from the mixture, wherein the compound is composed of an acceptor A and a donor D, and the compound has a following structural formula of Formula 1:
- D-A Formula 1.
6 more elements
Dependencies are inferred from the claim text.