Organic electroluminescent material and organic electroluminescent device comprising same

Patent metadata

Field	Value
Publication number	US-11424412-B2
Application number	US-202017613794-A
Country	US
Kind code	B2
Filing date	May 18, 2020
Priority date	Jun 19, 2019
Publication date	Aug 23, 2022
Grant date	Aug 23, 2022

Abstract

The present invention related to an organic electroluminescent material and organic electroluminescent device thereof. The organic electroluminescent material has the structural formula as shown in formula 1. Compared with a monoamine structure containing an adamantyl group, the diamine structure disclosed in the present invention has higher HOMO energy level and hole mobility, and can exhibit higher efficiency and service life than a monoamine material device. The organic electroluminescent device comprising the organic electroluminescent material has lower driving voltage, and higher luminous efficiency and service life.

First claim

The invention claimed is:

1. An organic electroluminescent material, having a structure as shown in chemical formula 1:

wherein R 2 , R 4 , and R 5 are identical or different, and are each independently selected from the following substituted or unsubstituted groups: phenyl, naphthyl, pyrenyl, dimethylfluorenyl, anthracenyl, phenanthryl, chrysenyl, azulenyl, acenaphthenyl, biphenyl, benzanthracenyl, quinolinyl, indolyl, carbazolyl, dibenzofuryl, dibenzothienyl, and dibenzoselenophenyl;
R 1 and R 3 are identical or different, and are each independently selected from substituted or unsubstituted following groups: phenylene, naphthylene, pyrenylene, dimethylfluorenylene, anthracenylene, phenanthrylene, chrysenylene, azulenylene, acenaphthenylene, biphenylene, terphenylene, and benzanthracenylene;
the “substituted” means to be independently substituted by substituent(s) selected from the following groups: methyl, ethyl, propyl, and aryl group with 6 carbon atoms.

2. The organic electroluminescent material according to claim 1 , wherein R 1 and R 3 are identical or different, and are each independently selected from substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, substituted or unsubstituted terphenylene, substituted or unsubstituted chrysenylene, substituted or unsubstituted phenanthrylene, substituted or unsubstituted naphthylene, and substituted or unsubstituted azulenylene;
the “substituted” means to be independently substituted by substituent(s) selected from the following groups: methyl, ethyl, propyl, and aryl group with 6 carbon atoms.

3. An organic electroluminescent material, which has one of the following structures:

4. An organic electroluminescent device, comprising a cathode, an anode, and one or more organic layers arranged between the cathode and the anode, at least one of the organic layers comprising the electroluminescent material according to claim 1 .

5. The organic electroluminescent device according to claim 4 , wherein the organic layer comprises a hole injection layer, a hole transport layer, an electron-blocking layer, an emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

6. The organic electroluminescent device according to claim 5 , wherein the electroluminescent material is comprised in the hole transport layer.

7. The organic electroluminescent device according to claim 5 , wherein the electroluminescent material is comprised in the electron-blocking layer.

8. An organic electroluminescent device, comprising a cathode, an anode, and one or more organic layers arranged between the cathode and the anode, at least one of the organic layers comprising the electroluminescent material according to claim 3 .

9. The organic electroluminescent device according to claim 8 , wherein the organic layers comprise a hole injection layer, a hole transport layer, an electron-blocking layer, a light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer.

10. The organic electroluminescent device according to claim 9 , wherein the electroluminescent material is comprised in the hole transport layer.

11. The organic electroluminescent device according to claim 9 , wherein the electroluminescent material is comprised in the electron-blocking layer.

Assignees

• Shaanxi Lighte Optoelectronics Mat Co Ltd

Inventors

• Ma Tiantian
• Nie Qiqi
• Feng Zhen
• Li Hongyan
• Sha Xunshan
• Sun Zhanyi
• Wang yalong

Classifications

• H10K50/181

  Electron blocking layers · CPC title

• H10K50/171

  Electron injection layers · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K85/633

  comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom · CPC title

• C07D209/86 Primary

  with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system · CPC title