Organic electroluminescence device and material for organic electroluminescence device

Patent metadata

Field	Value
Publication number	US-2015144927-A1
Application number	US-201414554872-A
Country	US
Kind code	A1
Filing date	Nov 26, 2014
Priority date	Nov 27, 2013
Publication date	May 28, 2015
Grant date	—

Abstract

An organic electroluminescence (EL) device includes a charge generating layer including a charge generating material or a hole injection layer including a hole injection material, the charge generating material or the hole injection material including a 1,2-closo-carborane compound represented by the following Formula 1:

wherein each Ar 1 is independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.

First claim

What is claimed is:

1 . An organic electroluminescence (EL) device comprising a charge generating layer including a charge generating material or a hole injection layer including a hole injection material,
the charge generating material or the hole injection material including a 1,2-closo-carborane compound represented by the following Formula 1:

wherein each Ar t is independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.

2 . The organic EL device as claimed in claim 1 , wherein each Ar 1 is independently an aryl group substituted with an electroattracting group or a heteroaryl group substituted with an electroattracting group.

3 . The organic EL device as claimed in claim 2 , wherein the electroattracting group is an electroattracting group having a substituent constant (r) greater than 0.07 in the Hammett equation.

4 . The organic EL device as claimed in claim 2 , wherein the electroattracting group is a halogen atom, a methyl group substituted with a halogen atom, or a cyano group.

5 . The organic EL device as claimed in claim 1 , wherein a lowest unoccupied molecular orbital (LUMO) level of the charge generating material or a LUMO level of the hole injection material is less than or equal to about 3.40 eV.

6 . The organic EL device as claimed in claim 1 , wherein:
the organic EL device includes the charge generating layer, and the organic EL device includes at least a first emission unit and a second emission unit, the first and second emission units being stacked in series, the stacked emission units including, in sequence, an anode, a first emission layer, the charge generating layer, a second emission layer, and a cathode.

7 . An organic electroluminescence (EL) device comprising a charge generating layer including a charge generating material or a hole injection layer including a hole injection material,
the charge generating material or the hole injection material including a 1,2-closo-carborane compound represented by the following Formula 2:

wherein each Ar 1 and Ar 2 are independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.

8 . The organic EL device as claimed in claim 7 , wherein at least one of Ar 1 or Ar 2 is an aryl group substituted with an electroattracting group or a heteroaryl group substituted with an electroattracting group.

9 . The organic EL device as claimed in claim 8 , wherein the electroattracting group is an electroattracting group having a substituent constant (a) greater than 0.07 in the Hammett equation.

10 . The organic EL device as claimed in claim 8 , wherein the electroattracting group is a halogen atom, a methyl group substituted with a halogen atom, or a cyano group.

11 . The organic EL device as claimed in claim 7 , wherein a lowest unoccupied molecular orbital (LUMO) level of the charge generating material or a LUMO level of the hole injection material is less than or equal to about 3.40 eV.

12 . The organic EL device as claimed in claim 7 , wherein:
the organic EL device includes the charge generating layer, and the organic EL device includes at least a first emission unit and a second emission unit, the first and second emission units being stacked in series, the stacked emission units including, in sequence, an anode, a first emission layer, the charge generating layer, a second emission layer, and a cathode.

13 . A material for an organic electroluminescence (EL) device comprising a 1,2-closo-carborane compound represented by the following Formula 1:

wherein each Ar 1 is independently an aryl group substituted with an electroattracting group or a heteroaryl group substituted with an electroattracting group.

14 . The material for an organic EL device as claimed in claim 13 , wherein the electroattracting group is an electroattracting group having a substituent constant (σ) greater than 0.07 in the Hammett equation.

15 . The material for an organic EL device as claimed in claim 13 , wherein the electroattracting group is a halogen atom, a methyl group substituted with a halogen atom, or a cyano group.

16 . The organic EL device as claimed in claim 13 , wherein a lowest unoccupied molecular orbital (LUMO) level of the material is less than or equal to about 3.40 eV.

17 . A material for an organic electroluminescence (EL) device comprising a 1,2-closo-carborane compound represented by the following Formula 2:

wherein each Ar 1 and Ar 2 are independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.

18 . The material for an organic EL device as claimed in claim 17 , wherein at least one of Ar 1 or Ar 2 is an aryl group substituted with an electroattracting group or a heteroaryl group substituted with an electroattracting group.

19 . The material for an organic EL device as claimed in claim 18 , wherein the electroattracting group is an electroattracting group having a substituent constant (a) greater than 0.07 in the Hammett equation.

20 . The material for an organic EL device as claimed in claim 18 , wherein the electroattracting group is a halogen atom, a methyl group substituted with a halogen atom, or a cyano group.

21 . The organic EL device as claimed in claim 17 , wherein a lowest unoccupied molecular orbital (LUMO) level of the material is less than or equal to about 3.40 eV.

Assignees

• Samsung Display Co Ltd
• Nat Univ Corp Yamagata Univ

Inventors

• Jin Xiulan
• Kido Junji
• Sasabe Hisahiro
• Udagawa Kazuo

Classifications

• H10K85/658

  Organoboranes · CPC title

• H10K85/322 Primary

  comprising boron · CPC title

• C07F5/027 Primary

  Organoboranes and organoborohydrides · CPC title

• H01L51/008 Primary

  Electricity · mapped topic

• H01L51/5088

  Electricity · mapped topic