Heteroaromatic compound and organic electroluminescence device using the same

Patent metadata

Field	Value
Publication number	US-10844043-B2
Application number	US-201815961833-A
Country	US
Kind code	B2
Filing date	Apr 24, 2018
Priority date	Apr 24, 2018
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

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 can operate under reduced driving voltage, increase current efficiency, and prolong half-life time.

First claim

What is claimed is:

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

wherein X 1 is a divalent bridge selected from the group consisting of O, S, Se, CR 4 R 5 , NR 6 , and SiR 7 R 8 ; X 2 is absent or a divalent bridge selected from the group consisting of O, S, Se, CR 9 R 10 , NR 11 , and SiR 12 R 13 ; A represents an unsubstituted fused ring hydrocarbon unit with two to nine rings; m is an integer of 0 to 4; B represents formula (2) below:

wherein ring C represents a phenyl ring or a fused ring hydrocarbon unit with two to five rings; Y represents a divalent bridge selected from the group consisting of O, S, Se, CR 14 R 15 , NR 16 , and SiR 17 R 18 ; when X 2 is absent, R 1 and R 2 are independently a hydrogen atom, an unsubstituted alkyl group having 1 to 60 carbon atoms, an unsubstituted aryl group having 6 to 60 carbon atoms, an unsubstituted aralkyl group having 6 to 60 carbon atoms, an unsubstituted heteroaryl group having 3 to 60 carbon atoms, an unsubstituted arylamine group having 6 to 60 carbon atoms, or fused with the connected phenyl group to form a naphthyl group, a dibenzofuranyl group, or a dibenzothiophenyl group; when X 2 is a divalent bridge selected from the group consisting of O, S, Se, CR 9 R 10 , NR 11 , and SiR 12 R 13 , R 1 and R 2 are independently a hydrogen atom, an unsubstituted alkyl group having 1 to 60 carbon atoms, an unsubstituted aryl group having 6 to 60 carbon atoms, an unsubstituted aralkyl group having 6 to 60 carbon atoms, an unsubstituted heteroaryl group having 3 to 60 carbon atoms, or an unsubstituted arylamine group having 6 to 60 carbon atoms; and R 3 to R 18 are independently a hydrogen atom, an unsubstituted alkyl group having 1 to 60 carbon atoms, an unsubstituted aryl group having 6 to 60 carbon atoms, an unsubstituted aralkyl group having 6 to 60 carbon atoms, an unsubstituted heteroaryl group having 3 to 60 carbon atoms, or an unsubstituted arylamine group having 6 to 60 carbon atoms.

2. The heteroaromatic compound according to claim 1 , wherein A represents an unsubstituted naphthyl group, an unsubstituted phenanthrenyl group, an unsubstituted anthracenyl group, an unsubstituted pyrenyl group, an unsubstituted chrysenyl group, an unsubstituted triphenylenyl group, an unsubstituted perylenyl group, an unsubstituted tetraphenylenyl group, or an unsubstituted 7,14-diphenylacenaphtho[1,2-k]fluoranthene group.

3. The heteroaromatic compound according to claim 1 , wherein A represents one of the following formulas:

wherein R 19 to R 24 are independently a hydrogen atom, an unsubstituted alkyl group having 1 to 30 carbon atoms, an unsubstituted aryl group having 6 to 30 carbon atoms, an unsubstituted aralkyl group having 6 to 30 carbon atoms, an unsubstituted heteroaryl group having 3 to 30 carbon atoms, or an unsubstituted arylamine group having 6 to 30 carbon atoms.

4. The heteroaromatic compound according to claim 1 , wherein the heteroaromatic compound is represented by one of the following formula (3) to formula (13):

5. A heteroaromatic compound selected from the group consisting of compound 1 to compound 358:

Assignees

• Yen Feng Wen
• Chuang Li Chieh

Inventors

• Yen Feng-Wen
• Chuang Li-Chieh

Classifications

• C07D401/10 Primary

  linked by a carbon chain containing aromatic rings · CPC title

• C09K2211/1092

  containing sulfur as the only heteroatom · CPC title

• C07D487/06

  Peri-condensed systems · CPC title

• C07D221/18 Primary

  Ring systems of four or more rings · CPC title

• C07D491/04

  Ortho-condensed systems · CPC title