# US 2014/0151665 A1 · Carbazole derivative and organic electroluminescence device using the same

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- Number: US 2014/0151665 A1
- Document ID: US20140151665A1
- Status: Published application
- Kind: A1
- Application number: 14/093,774
- Filed: 2013-12-02
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Shuri SATO
- Web page: https://patentgrep.com/patent/US20140151665A1

## CPC

- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)}
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An indolo[3,2,1-jk] carbazole derivative is represented by the following Formula 1. In Formula 1, X is a carbon atom or a nitrogen atom. At least one of X is a nitrogen atom. when X is a nitrogen atom, R is not present. When X is a carbon atom, R is hydrogen, an alkyl group, an alkoxy group, an aryl group, or a heteroaryl group. L is an electron acceptor, and m and n represent an integer of greater than or equal to 1.

## Claims

### Claim 1

An indolo[3,2,1-jk] carbazole derivative, in which an indolo[3,2,1-jk] carbazole skeleton and an electron acceptor are combined, and at least one carbon atom of a benzene ring forming the indolo[3,2,1-jk] carbazole skeleton is replaced with a nitrogen atom.

### Claim 2 (depends on 1)

The indolo[3,2,1-jk] carbazole derivative as claimed in claim 1, wherein the L in Formula 1 is a pyridine derivative, a pyrimidine derivative, a triazine derivative, an imidazole derivative, a dibenzofuran derivative, or a dibenzothiophene derivative.

### Claim 3 (depends on 1)

The indolo[3,2,1-jk] carbazole derivative as claimed in claim 1, wherein the indolo[3,2,1-jk] carbazole derivative is represented by following Formula 1:
wherein X is a carbon atom or a nitrogen atom,
at least one of X is a nitrogen atom,
when X is a nitrogen atom, R is not present,
when X is a carbon atom, R is hydrogen, an alkyl group, an alkoxy group, an aryl group, or a heteroaryl group,
L is an electron acceptor,
and m and n represent an integer of greater than or equal to 1.

### Claim 4 (depends on 3)

The indolo[3,2,1-jk] carbazole derivative as claimed in claim 3, wherein the L in Formula 1 is a pyridine derivative, a pyrimidine derivative, a triazine derivative, an imidazole derivative, a dibenzofuran derivative, or a dibenzothiophene derivative.

### Claim 5 (depends on 1)

The indolo[3,2,1-jk] carbazole derivative as claimed in claim 1, being a compound represented by one of the following formulas:

### Claim 6

An organic electroluminescence device, comprising an emission layer including an indolo[3,2,1-jk] carbazole derivative, in which an indolo[3,2,1-jk] carbazole skeleton and an electron acceptor are combined, and at least one carbon atom of a benzene ring forming the indolo[3,2,1-jk] carbazole skeleton is replaced with a nitrogen atom.

### Claim 7 (depends on 6)

The organic electroluminescence device as claimed in claim 6, wherein the indolo[3,2,1-jk] carbazole derivative is represented by following Formula 1:
wherein X is a carbon atom or a nitrogen atom,
at least one of X is a nitrogen atom,
when X is a nitrogen atom, R is not present,
when X is a carbon atom, R is hydrogen, an alkyl group, an alkoxy group, an aryl group, or a heteroaryl group,
L is an electron acceptor, and
m and n represent an integer of greater than or equal to 1.

### Claim 8 (depends on 7)

The organic electroluminescence device as claimed in claim 7, wherein the L in Formula 1 is a pyridine derivative, a pyrimidine derivative, a triazine derivative, an imidazole derivative, a dibenzofuran derivative, or a dibenzothiophene derivative.

### Claim 9 (depends on 6)

The organic electroluminescence device as claimed in claim 6, wherein the indolo[3,2,1-jk] carbazole derivative is a compound represented by one of the following formulas

### Claim 10

An organic electroluminescence device, comprising an intermediate layer between a hole transport layer and an emission layer,
wherein the intermediate layer includes an indolo[3,2,1-jk] carbazole derivative, in which an indolo[3,2,1-jk] carbazole skeleton and an electron acceptor are combined, and at least one carbon atom of a benzene ring forming the indolo[3,2,1-jk] carbazole skeleton is replaced with a nitrogen atom.

### Claim 11 (depends on 10)

The organic electroluminescence device as claimed in claim 10, wherein the indolo[3,2,1-jk] carbazole derivative is represented by following Formula 1:
wherein X is a carbon atom or a nitrogen atom,
at least one of X is a nitrogen atom,
when X is a nitrogen atom, R is not present,
when X is a carbon atom, R is hydrogen, an alkyl group, an alkoxy group, an aryl group, or a heteroaryl group,
L is an electron acceptor, and
m and n represent an integer of greater than or equal to 1.

### Claim 12 (depends on 10)

The organic electroluminescence device as claimed in claim 10, wherein the L in Formula 2 is a pyridine derivative, a pyrimidine derivative, a triazine derivative, an imidazole derivative, a dibenzofuran derivative, or a dibenzothiophene derivative.

### Claim 13 (depends on 10)

The organic electroluminescence device as claimed in claim 10, wherein the indolo[3,2,1-jk] carbazole derivative is a compound represented by one of the following formulas: