Triarylamine compound, light-emitting element, light-emitting device, electronic device, and lighting device

Patent metadata

Field	Value
Publication number	US-9525143-B2
Application number	US-201514732097-A
Country	US
Kind code	B2
Filing date	Jun 5, 2015
Priority date	Jun 24, 2011
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A novel triarylamine compound having a bipolar property is provided. The triarylamine compound can be used for a hole-injection layer, a hole-transport layer, a light-emitting layer, or an electron-transport layer in a light-emitting element. The triarylamine compound can also be used as a host material with a light-emitting material which emits relatively short-wavelength light, in a structure where the host material and the guest material constitute a light-emitting layer. The triarylamine compound of the present invention is a fluorescent compound and therefore can also be used as a light-emitting substance of a light-emitting layer. A light-emitting element having high emission efficiency is provided. A light-emitting device, an electronic device, or a lighting device having low power consumption is provided.

First claim

What is claimed is:

1. A light-emitting element comprising:
a light-emitting layer between a pair of electrodes,
wherein the light-emitting layer includes a triarylamine compound represented by a general formula (G1),

wherein:
E 1 represents a nitrogen atom, wherein a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group is bonded to the nitrogen atom;
α 1 to α 3 each independently represent a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenylene group, and m and n are each independently 0 or 1;
Ar 1 represents an aryl group represented by a general formula (G1-2) below;
Ar 2 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 1 to R 4 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group, and

wherein:
E 2 represents a nitrogen atom, and when E 2 represents a nitrogen atom, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group is bonded to the nitrogen atom;
α 4 to α 6 each independently represent a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group, and q is 0 or 1;
Ar 3 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 5 to R 8 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group.

2. A light-emitting device comprising the light-emitting element according to claim 1 .

3. An electronic device comprising the light-emitting device according to claim 2 .

4. A lighting device comprising the light-emitting device according to claim 2 .

5. A light-emitting element comprising:
a light-emitting layer between a pair of electrodes,
wherein the light-emitting layer includes a triarylamine compound represented by a general formula (G2),

wherein:
E 1 represents a nitrogen atom, wherein a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group is bonded to the nitrogen atom;
α 1 represents a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenylene group, and m and n are each independently 0 or 1;
Ar 1 represents an aryl group represented by a general formula (G2-2) below;
Ar 2 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 1 to R 4 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group, and

wherein:
E 2 represents a nitrogen atom, wherein a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group is bonded to the nitrogen atom;
α 4 represents a substituted or unsubstituted phenylene group or a substituted or unsubstituted biphenylene group, and q is 0 or 1;
Ar 3 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 5 to R 8 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group.

6. A light-emitting device comprising the light-emitting element according to claim 5 .

7. An electronic device comprising the light-emitting device according to claim 6 .

8. A lighting device comprising the light-emitting device according to claim 6 .

9. A light-emitting element comprising:
a light-emitting layer between a pair of electrodes,
wherein the light-emitting layer includes a triarylamine compound represented by a general formula (G3),

wherein:
E 1 represents nitrogen atom, wherein a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group is bonded to the nitrogen atom;
m and n are each independently 0 or 1;
Ar 1 represents an aryl group represented by a general formula (G3-2) below;
Ar 2 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 1 to R 4 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group, and

wherein:
E 2 represents a nitrogen atom, wherein a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group is bonded to the nitrogen atom;
q is 0 or 1;
Ar 3 represents any of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted dibenzofuranyl group; and
R 5 to R 8 each independently represent any of a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, and a substituted or unsubstituted phenyl group.

10. A light-emitting device comprising the light-emitting element according to claim 9 .

11. An electronic device comprising the light-emitting device according to clai

Assignees

• Semiconductor Energy Lab

Inventors

• Osaka Harue
• Ushikubo Takahiro
• Suzuki Tsunenori
• Ohsawa Nobuharu

Classifications

• C07D235/18 Primary

  with aryl radicals directly attached in position 2 · CPC title

• C07D413/12

  linked by a chain containing hetero atoms as chain links · CPC title

• C07D263/57 Primary

  Aryl or substituted aryl radicals · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/0061 Primary

  Electricity · mapped topic