Heteroaromatic compound and organic electroluminescence device using the same

Patent metadata

Field	Value
Publication number	US-11005047-B2
Application number	US-201815976879-A
Country	US
Kind code	B2
Filing date	May 11, 2018
Priority date	May 11, 2018
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A heteroaromatic compound which can be used as the fluorescent guest material in the light emitting layer of the organic electroluminescence device is disclosed. The organic electroluminescence device employing the heteroaromatic compound of the present invention shows lower power consumption, higher efficiency, and longer half-life time than the existed organic electroluminescence devices.

First claim

What is claimed is:

1. A heteroaromatic compound of formula (1) below:

wherein Ar 1 and Ar 2 are independently an aryl group or a heteroaryl group having 4 to 6 ring carbon atoms; Ar 3 is a cycloalkyl group, a cycloalkenyl group, or an aryl group having 5 to 6 ring carbon atoms; R 1 and R 2 are independently a hydrogen atom, a unsubstituted alkyl group having 1 to 36 carbon atoms, a unsubstituted aryl group having 6 to 36 carbon atoms, or a unsubstituted aralkyl group having 6 to 36 carbon atoms; W represents a divalent bridge selected from the group consisting of O, S, CR 3 R 4 , NR 5 , and SiR 6 R 7 , and R 3 to R 7 are independently a hydrogen atom or a unsubstituted alkyl group having 1 to 20 carbon atoms; X is absent or a divalent bridge selected from the group consisting of O, S, CR 8 R 9 , NR 10 , and SiR 11 R 12 ; A is absent or represents formula (2) below:

wherein Y represents a divalent bridge selected from the group consisting of O, S, CR 13 R 14 , NR 15 , and SiR 16 R 17 ; and R 8 to R 17 are independently a hydrogen atom, a unsubstituted alkyl group having 1 to 36 carbon atoms, a unsubstituted aryl group having 6 to 36 carbon atoms, a unsubstituted aralkyl group having 6 to 36 carbon atoms, or a unsubstituted heteroaryl group having 3 to 36 carbon atoms.

2. The heteroaromatic compound according to claim 1 , wherein Ar 1 and Ar 2 are independently

3. The heteroaromatic compound according to claim 1 , wherein Ar 3 is

4. A heteroaromatic compound selected from the group consisting of following compounds:

5. An organic electroluminescence device, comprising a pair of electrodes composed of a cathode and an anode, and a light emitting layer between the pair of electrodes, wherein the light emitting layer comprises the heteroaromatic compound according to claim 4 .

6. The organic electroluminescence device according to claim 5 , wherein the heteroaromatic compound of formula (1) is a fluorescent dopant material.

7. The organic electroluminescence device according to claim 5 , wherein the light emitting layer emits blue fluorescence.

8. The organic electroluminescence device according to claim 5 , wherein the organic electroluminescence device is a lighting panel.

9. The organic electroluminescence device according to claim 5 , wherein the organic electroluminescence device is a backlight panel.

Assignees

• Yen Feng Wen
• Chuang Li Chieh
• Huang Tsun Yuan
• Luminescence Tech Corp

Inventors

• Yen Feng-Wen
• Chuang Li-Chieh
• Huang Tsun-Yuan

Classifications

• C07D519/00

  Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00 · CPC title

• C07D307/94 Primary

  spiro-condensed with carbocyclic rings or ring systems, e.g. griseofulvins · CPC title

• C09K2211/1014

  bridged by heteroatoms, e.g. N, P, Si or B · CPC title

• C07D471/10

  Spiro-condensed systems · CPC title

• C07D409/04

  directly linked by a ring-member-to-ring-member bond · CPC title