Organic electroluminescent element, material for organic electroluminescent element, and light emitting device, display device and lighting device each using organic electroluminscent element

Patent metadata

Field	Value
Publication number	US-9876175-B2
Application number	US-201214239696-A
Country	US
Kind code	B2
Filing date	Aug 6, 2012
Priority date	Aug 22, 2011
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

An organic electroluminescent element including a substrate, a pair of electrodes including an anode and a cathode, disposed on the substrate, and at least one organic layer including a light emitting layer, disposed between the electrodes, in which a compound represented by the following formula (I) is contained in any layer of the at least one organic layer. The organic electroluminescent element has high luminous efficiency and a strong effect of improving the durability by driving aging:

wherein X, A 1 , A 2 , A 3 , A 4 , and R 1 to R 8 are as defined herein.

First claim

The invention claimed is:

1. An organic electroluminescent element comprising:
a substrate;
a pair of electrodes including an anode and a cathode, disposed on the substrate; and
at least one organic layer including a light emitting layer, disposed between the electrodes,
wherein at least one kind of compound represented by the following general formula (I) is contained in any layer of the at least one organic layer:

wherein X represents a linking group; A 1 , A 2 , A 3 and A 4 each independently represent C—R or an N atom; R's each independently represent a hydrogen atom or a substituent, but there is no case where R's, which are present in plural, are bonded to each other to form a ring; R 1 to R 8 each independently represent a hydrogen atom or a substituent, but there is no case where adjacent substituents selected from R 1 to R 8 are bonded to each other to form a ring, and at least one of R 4 and R 6 is an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 3 to 30 carbon atoms, or a di-substituted amino group,
with the proviso that R 4 or R 6 do not comprise an aryl group or a heteroaryl group, wherein the aryl group or heteroaryl group is substituted with a di-substituted amino group.

2. The organic electroluminescent element according to claim 1 , wherein in the general formula (I), X is CR 12 R 13 , NR 14 , SiR 15 R 16 , an O atom, or an S atom, wherein R 12 , R 13 , R 14 , R 15 and R 16 are each independently represent a fluorine atom, an alkyl group, an aryl group, or a heteroaryl group.

3. The organic electroluminescent element according to claim 1 , wherein in the general formula (I) A 1 , A 2 , A 3 and A 4 each independently represent C—R.

4. The organic electroluminescent element according to claim 1 wherein the compound represented by the general formula (I) is a compound represented by the following general formula (II):

wherein R 1 to R 8 and R 21 to R 24 represent a hydrogen atom or a substituent, provided there is no case where adjacent substituents selected from R 1 to R 8 , R 21 to R 24 are bonded to each other to form a ring; R 14 represents an alkyl group, an aryl group, or a heteroaryl group.

5. The organic electroluminescent element according to claim 1 , wherein in the compound represented by in the general formula (I), R 4 and R 6 are each independently an aryl group having 6 to 30 carbon atoms or a heteroaryl group having 5 to 30 carbon atoms.

6. The organic electroluminescent element according to claim 1 , wherein in the compound represented by in the general formula (I), R 1 , R 2 , R 3 , R 5 , R 7 and R 8 are a hydrogen atom.

7. The organic electroluminescent element according to claim 1 , wherein the molecular weight of the compound represented by the general formula (I) is 510 to 840.

8. The organic electroluminescent element according to claim 1 , wherein the compound represented by the general formula (I) is contained in the light emitting layer.

9. The organic electroluminescent element according to claim 1 , wherein the compound represented by the general formula (I) is a light emitting material contained in the light emitting layer.

10. The organic electroluminescent element according to claim 9 , further comprising a host material in the light emitting layer.

11. The organic electroluminescent element according to claim 10 , wherein the host material has an anthracene skeleton.

12. A light emitting device using the organic electroluminescent element according to claim 1 .

13. A display device using the organic electroluminescent element according to claim 1 .

14. An illumination device using the organic electroluminescent element according to claim 1 .

15. A light emitting material for an organic electroluminescent element, represented by the following general formula (I):

wherein X is CR 12 R 13 , NR 14 , SiR 15 R 16 , an O atom, or an S atom, wherein R 12 , R 13 , R 14 , R 15 and R 16 are each independently represent a fluorine atom, an alkyl group, an aryl group, or a heteroaryl group; A 1 , A 2 , A 3 and A 4 each independently represent C—R or an N atom; R's each independently represent a hydrogen atom or a substituent, but there is no case where R's, which are present in plural, are bonded to each other to form a ring; R 1 to R 8 each independently represent a hydrogen atom or a substituent, and at least one of R 4 and R 6 is an aryl group having 6 to 30 carbon atoms, a heteroaryl group having 3 to 30 carbon atoms, or a di-substituted amino group, but there is no case where adjacent substituents selected from R 1 to R 8 are bonded to each other to form a ring,
with the proviso that R 4 or R 6 do not comprise an aryl group or a heteroaryl group, wherein the aryl group or heteroaryl group is substituted with a di-substituted amino group.

16. A light emitting material for an organic electroluminescent element, represented by the following general formula (I):

wherein X is CR 12 R 13 , SiR 15 R 16 , an O atom, or an S atom, wherein R 12 , R 13 , R 14 , R 15 and R 16 are each independently represent a fluorine atom, an alkyl group, an aryl group, or a heteroaryl group; A 1 , A 2 , A 3 and A 4 each independently represent C—R or an N atom; R's each independently represent a hydrogen atom or a substituent, but there is no case where R's, which are present in plural, are bonded to each other to form a ring; R 1 to R 8 each independently represent a hydrogen atom or a substituent, but there is no case where adjacent substituents selected from R 1 to R 8 are bonded to each other to form a ring, and at least one of R 4 and R 6 represents a substituent.

Assignees

• Takaku Koji
• Kitamura Tetsu
• Watanabe Toru
• Yamamoto Yosuke
• Nomura Kimiatsu
• Sotoyama Wataru
• Takada Saki
• Ise Toshihiro
• Udc Ireland Ltd

Inventors

• Takaku Koji
• Kitamura Tetsu
• Watanabe Toru
• Yamamoto Yosuke
• Nomura Kimiatsu
• Sotoyama Wataru
• Takada Saki
• Ise Toshihiro

Classifications

• H01L51/0061

  Electricity · mapped topic

• H01L51/0058

  Electricity · mapped topic

• C09K2211/1088

  containing oxygen as the only heteroatom · CPC title

• H01L51/006

  Electricity · mapped topic

• C09K2211/1029

  containing one nitrogen atom as the heteroatom · CPC title