# US 8,541,574 B2 · Organometallic complex, and light-emitting element, light-emitting device and electronic device using the organometallic complex

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- Number: US 8,541,574 B2
- Document ID: US8541574B2
- Status: Granted
- Kind: B2
- Application number: 13/680,705
- Filed: 2012-11-19
- Published: 2013-03-28
- Granted: 2013-09-24
- Earliest claimed: 2007-06-04
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Hideko Inoue; Satoshi Seo; Nobuharu Ohsawa
- Web page: https://patentgrep.com/patent/US8541574B2

## CPC

- C09K 11/06: containing organic luminescent materials
- C07F 15/0033: {Iridium compounds}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

According to the present invention, a wider variation of organometallic complexes that can emit phosphorescence can be provided by applying, as a ligand, an organic compound from which a variety of derivatives can be easily synthesized. In particular, an organometallic complex having a sharp emission spectrum is provided. Further, an organometallic complex having high emission efficiency is provided. An organometallic complex represented by the general formula (G1) is provided. In the formula, Ar represents an aryl group, R represents an alkoxy group having 1 to 4 carbon atoms, and R1 and R2 individually represent either hydrogen or an alkyl group having 1 to 4 carbon atoms.

## Claims

### Claim 1

An organometallic complex represented by a general formula (G11),
wherein R3 to R6 individually represent hydrogen, an alkyl group, an alkoxy group, a halogen group, a haloalkyl group, an aryl group, a dialkylamino group, or a diarylamino group; M is a central metal and represents an element belonging to Group 9 or Group 10 in the periodic table; L represents a monoanionic ligand; and n is 2 when the M is an element belonging to Group 9, and n is 1 when the M is an element belonging to Group 10.

### Claim 2 (depends on 1)

The organometallic complex according to claim 1, wherein the monoanionic ligand is any of structural formulae (L1) to (L8).

### Claim 3 (depends on 1)

The organometallic complex according to claim 1, wherein the M is iridium or platinum.