Compound, display panel, and display device

Patent metadata

Field	Value
Publication number	US-12289989-B2
Application number	US-201916719733-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Sep 26, 2019
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

The present disclosure belongs to technical field of OLEDs, and provides a compound suitable as a hole transport material and an electron blocking material of OLEDs. The compound has a general structure according to [Chemical Formula 1], in which Ar 1 and Ar 2 are each independently selected from a hydrogen atom, a substituted or unsubstituted C5-C40 aryl, or a substituted or unsubstituted C5-C40 heteroaryl; m and n are each an integer independently selected from 0, 1, or 2; X is selected from O, S, or —NR—; R is selected from hydrogen, or a substituted or unsubstituted C5-C40 aryl; Ar 3 has a structure according to [Chemical Formula 2], in which R 1 -R 8 are each independently selected from a hydrogen atom, or a substituted or unsubstituted C5-C40 aryl; Y is selected from O, S, or —NR′—; and R′ is selected from a hydrogen atom, or a substituted or unsubstituted C5-C40 aryl.

First claim

What is claimed is:

1. A compound having a general structure according to Chemical Formula 1:

wherein Ar 1 and Ar 2 are each independently selected from the group consisting of a hydrogen atom and a substituted or unsubstituted C5-C40 heteroaryl;
m and n are each an integer independently selected from 0, 1, or 2, and m and n are not both 1;
X is —NH—;
Ar 3 has a structure according to Chemical Formula 2:

seven R7 seven of R 1 -R 8 are each independently selected from the group consisting of a hydrogen atom and a substituted or unsubstituted C5-C40 aryl, and the remaining one of R 1 -R 8 is a bonding position with Chemical Formula 1; and
Y is —NH—.

2. The compound according to claim 1 , wherein Ar 1 and Ar 2 are each a hydrogen atom.

3. The compound according to claim 1 , wherein m and n are each an integer independently selected from 0 or 1, and m and n are not both 1.

4. The compound according to claim 1 , wherein seven of R 1 -R 8 are each a hydrogen atom and the remaining one of R 1 -R 8 is a bonding position with Chemical Formula 1.

5. The compound according to claim 1 , wherein the compound has a molecular weight smaller than or equal to 1000.

6. The compound according to claim 1 , wherein the compound has a triplet energy level E T greater than or equal to 2.6 eV.

7. The compound according to claim 1 , wherein the compound has a glass transition temperature T g greater than or equal to 120° C.

8. A display panel comprising an organic light-emitting element,
wherein the organic light-emitting element comprises an anode, a cathode arranged opposite to the anode, a hole transport layer, and a light-emitting layer,
wherein the hole transport layer and the light-emitting layer are disposed between the anode and the cathode, and
wherein a material of the hole transport layer comprises one or more compounds according to claim 1 .

9. The display panel according to claim 8 , further comprising an electron blocking layer disposed between the anode and the cathode,
wherein the electron blocking layer comprises one or more compounds according to claim 1 .

10. A display device comprising the display panel according to claim 8 .

Assignees

• Shanghai Tianma Am Oled Co Ltd
• Wuhan Tianma Micro Electronics Co Ltd
• Wuhan Tianma Microelectronics Co Ltd Shanghai Branch

Inventors

• Zhang Lei
• Gao Wei
• Niu Jinghua
• Dai Wenpeng
• Xiao Wenjing
• Li Xia

Classifications

• H10K50/181

  Electron blocking layers · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K2101/30

  Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values · CPC title

• H10K85/6576

  comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene · CPC title

• H10K85/6574

  comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes · CPC title