Organic electroluminescent material and use thereof

Patent metadata

Field	Value
Publication number	US-10186668-B2
Application number	US-201715449918-A
Country	US
Kind code	B2
Filing date	Mar 4, 2017
Priority date	Mar 4, 2017
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

There is provided a novel material of formula(1) or formula(2) and the organic EL device employing the novel material as phosphorescent light emitting host of emitting layer, delayed fluorescence dopant of emitting layer, and hole blocking layer can display good performance like as lower driving voltage, power consumption, increasing efficiency and life time.

wherein m, X 1 to X 4 and R 1 to R 6 are the same definition as described in the present invention.

First claim

The invention claimed is:

1. A material with a general formula(1) or formula(2) as follows:

wherein m represents an integer of 0 to 4, X 1 to X 4 independently represent a divalent bridge selected from the atom or group consisting from O, S, C(R 7 )(R 8 ), N(Ar), Si(R 9 )(R 10 ), Ar is selected from the group consisting of a hydrogen, a substituted or unsubstituted aryl group having 6 to 60 carbon atoms or a substituted or unsubstituted heteroaryl group having 3 to 60 carbon atoms, and provided that when Ar is a substituted or unsubstituted heteroaryl group having 3 to 60 carbon atoms, Ar represents a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted biscarbazolyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted diazinyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted quinoline group, a substituted or unsubstituted isoquinoline group, a substituted or unsubstituted quinazoline group, a substituted or unsubstituted phenanthroline group, a substituted or unsubstituted dihydroacridine group, a substituted or unsubstituted phenothiazine group, a substituted or unsubstituted phenoxazine group, and a substituted or unsubstituted dihydrophenazine group; R 1 to R 10 are independently selected from the group consisting of a hydrogen atom, a halide, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms.

2. The material according to claim 1 , wherein the Ar is represented by the following formula(3) to formula(6):

wherein L 1 to L 4 represent a single bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heterarylene group having 3 to 30 ring carbon atoms, m represents an integer of 0 to 4, n represents an integer of 0 or 1, Y 1 to Y 3 independently represent a divalent bridge selected from the atom or group consisting from O, S, C(R 16 )(R 17 ), N(R 18 ), Z 1 to Z 6 represent a nitrogen atom or C(R s ), and each R s represents a hydrogen, a phenyl, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 30 carbon atoms; R 11 to R 18 are independently selected from the group consisting of a hydrogen atom, a halide, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms.

3. The material according to claim 1 , wherein the material is selected from the group consisting of:

4. A organic electroluminescence device comprising a pair of electrodes consisting of a cathode and an anode, and between the pairs of electrodes comprising at least a light emitting layer, one or more layers of organic thin film layer, wherein the light emitting layer or the organic thin film layer comprising the material according to claim 1 .

5. The organic electroluminescence device according to claim 4 , wherein the light emitting layer comprising the material with a general formula(1) or formula(2) is a phosphoescent host material.

6. The organic electroluminescence device according to claim 4 , wherein the light emitting layer comprising the material with a general formula(1) or formula(2) is a thermally activated delayed fluorescence host material.

7. The organic electroluminescence device according to claim 4 , wherein the light emitting layer comprising the material with a general formula(1) or formula(2) is a thermally activated delayed fluorescence dopant material.

8. The organic electroluminescence device according to claim 4 , wherein the organic thin film layer comprising the material with a general formula(1) or formula(2) is a hole blocking material.

9. The organic electroluminescence device according to claim 4 , wherein the organic thin film layer comprising the material with a general f formula(1) or formula(2) is an electron transport material.

10. The organic electroluminescence device according to claim 4 , wherein the light emitting layer emits phosphorescent red, blue, green and yellow lights.

11. The organic electroluminescence device according to claim 4 , wherein the light emitting layer emits thermally activated delayed fluorescent red, blue, green and yellow lights.

12. The orga

Assignees

• Yen Feng Wen
• Chang Cheng Hao

Inventors

• Yen Feng-Wen
• Chang Cheng-Hao

Classifications

• H01L51/5012

  Electricity · mapped topic

• C09K2211/1059

  containing three nitrogen atoms as heteroatoms · CPC title

• C09K11/025

  non-luminescent particle coatings or suspension media · CPC title

• H01L51/0072 Primary

  Electricity · mapped topic

• C07D487/04

  Ortho-condensed systems · CPC title