Light-emitting material, compound, and organic light-emitting element

Patent metadata

Field	Value
Publication number	US-11637244-B2
Application number	US-201716471231-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 21, 2016
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

A compound represented by the following general formula is excellent in light emission properties. R 1 and R 2 each independently represent a fluorinated alkyl group, D represents a substituent in which Hammett's σ p value is negative, and A represents a substituent in which Hammett's σ p value is positive.

First claim

The invention claimed is:

1. An organic light-emitting element comprising a compound represented by the following general formula (1):

wherein R 1 and R 2 each independently represent a fluorinated alkyl group, D represents a substituent in which Hammett's σ p value is negative, and A is represented by the following general formula (9):

wherein L 19 represents a substituted or non-substituted arylene group, or a substituted or non-substituted heteroarylene group; A 1 to A 5 each independently represent N or C(R 19 ) and at least one of A 1 to A 5 is N; and R 19 represents a hydrogen atom or a substituent.

2. The organic light-emitting element according to claim 1 , wherein R 1 and R 2 each independently represent a perfluoroalkyl group.

3. The organic light-emitting element according to claim 1 , wherein R 1 and R 2 each independently have 1 to 3 carbon atoms.

4. The organic light-emitting element according to claim 1 , wherein D has a substituted or non-substituted diarylamino structure.

5. The organic light-emitting element according to claim 4 , wherein D is an aryl group substituted with a substituted or non-substituted diarylamino group.

6. The organic light-emitting element according to claim 1 , comprising the compound as a host material.

7. The organic light-emitting element according to claim 1 , comprising the compound as a positive hole blocking material.

8. The organic light-emitting element according to claim 1 , comprising the compound as an electron blocking material.

9. The organic light-emitting element according to claim 1 , wherein a light-emitting layer includes the compound.

10. The organic light-emitting element according to claim 9 , wherein the light-emitting layer contains the compound in an amount of less than 50% by weight, and the light-emitting layer contains a host material in addition to the compound.

11. The organic light-emitting element according to claim 9 , wherein the light-emitting layer contains the compound in an amount of 50% or more by weight, and the light-emitting layer contains a light-emitting material in addition to the compound.

12. The organic light-emitting element according to claim 1 , wherein an anode, a plurality of organic layers including a light-emitting layer, and a cathode are stacked in order, and the compound is included in a layer in contact with a cathode side of the light-emitting layer.

13. The organic light-emitting element according to claim 1 , wherein the anode, the plurality of organic layers including a light-emitting layer, and the cathode are stacked in order, and the compound is included in a layer in contact with an anode side of the light-emitting layer.

14. The organic light-emitting element according to claim 1 that emits delayed fluorescence.

15. A compound represented by the general formula (1):

wherein R 1 and R 2 each independently represent a fluorinated alkyl group, D represents an aryl group substituted with a substituted or non-substituted diarylamino group in which Hammett's σ p value is negative, and A is represented by the following general formula (9):

wherein L 19 represents a substituted or non-substituted arylene group, or a substituted or non-substituted heteroarylene group; A 1 to A 5 each independently represent N or C(R 19 ) and at least one of A 1 to A 5 is N; and R 19 represents a hydrogen atom or a substituent.

Assignees

• Univ Kyushu Nat Univ Corp
• Kyulux Inc

Inventors

• Geng Yan
• Adachi Chihaya
• Nakanotani Hajime
• NOTSUKA Naoto
• NASU Keiro

Classifications

• H10K50/181

  Electron blocking layers · CPC title

• H10K85/654

  comprising only nitrogen as heteroatom (H10K85/652 takes precedence) · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• H10K2101/10

  Triplet emission · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title