# US 7,745,017 B2 · Organic electroluminescent device and method for producing the same

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- Number: US 7,745,017 B2
- Document ID: US7745017B2
- Status: Granted
- Kind: B2
- Application number: 11/166,158
- Filed: 2005-06-27
- Published: 2005-12-29
- Granted: 2010-06-29
- Earliest claimed: 2004-06-28
- Assignees: FUJIFILM Corporation
- Inventors: Tetsuo Nakamura; Tatsuya Igarashi; Takeshi Murakami; Masayuki Mishima
- Web page: https://patentgrep.com/patent/US7745017B2

## CPC

- C09K 11/06: containing organic luminescent materials
- H05B 33/14: characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source}
- H10K 85/342: {comprising iridium}
- C09K 2211/1029: containing one nitrogen atom as the heteroatom
- C09K 2211/185: of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom}
- H10K 85/6565: {Oxadiazole compounds}
- H10K 85/657: {Polycyclic condensed heteroaromatic hydrocarbons}
- Y10S 428/917: Electroluminescent
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An organic electroluminescent device and a method for producing the same, the organic electroluminescent device including a luminescent layer produced by a vapor-deposition method disposed between a pair of electrodes, the luminescent layer containing at least one host material and at least one metal complex including a partial structure represented by formula (I): wherein M represents a metal atom, R1, R2 and R4 to R8 each independently represent a hydrogen atom or a substituent, and R3 represents a group represented by formula (II), an alkoxy group or an aryloxy group: wherein R11 to R13 each independently represent a hydrogen atom or a substituent, provided that at least two of them each independently represent an alkyl group or an aryl group.

## Claims

### Claim 1

An organic electroluminescent device comprising a luminescent layer produced by a vapor-deposition method disposed between a pair of electrodes, the luminescent layer containing at least one host material and at least one metal complex including a partial structure represented by formula (I):
Formula (I)
wherein R3 represents a tertiary alkyl group having 5 to 8 carbon atoms;
wherein the metal complex is a complex wherein all three ligands are the same.

### Claim 2 (depends on 1)

The organic electroluminescent device of claim 1, wherein the luminescent layer contains only materials having a molecular weight of 3,000 or less.

### Claim 3 (depends on 1)

The organic electroluminescent device of claim 1, wherein the luminescent layer contains only materials having a molecular weight of from 200 to 2,000.

### Claim 4 (depends on 1)

The organic electroluminescent device of claim 1, wherein the at least one host material comprises a carbazole derivative.

### Claim 5

A method for producing an organic electroluminescent device comprising a luminescent layer disposed between a pair of electrodes, the method comprising vapor-depositing at least one host material and at least one metal complex including a partial structure represented by formula (I) to form the luminescent layer:
Formula (I)
wherein R3 represents a tertiary alkyl group having 5 to 8 carbon atoms;
wherein the metal complex is a complex wherein all three ligands are the same.

### Claim 6 (depends on 5)

The method for producing an organic electroluminescent device of claim 5, wherein the at least one host material and the at least one metal complex each have a molecular weight of 3,000 or less.

### Claim 7 (depends on 5)

The method for producing an organic electroluminescent device of claim 5, wherein the at least one host material and the at least one metal complex each have a molecular weight of from 200 or more and 2,000 or less.

### Claim 8 (depends on 5)

The method for producing an organic electroluminescent device of claim 5, wherein the at least one host material comprises a carbazole derivative.