# US 11,910,710 B2 · Organic compound, light-emitting element, light-emitting device, electronic device, and lighting device

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- Number: US 11,910,710 B2
- Document ID: US11910710B2
- Status: Granted
- Kind: B2
- Application number: 16/573,475
- Filed: 2019-09-17
- Published: 2020-01-09
- Granted: 2024-02-20
- Earliest claimed: 2012-07-13
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Tomoya Hirose; Hiroshi Kadoma; Satoko Shitagaki; Satoshi Seo
- Web page: https://patentgrep.com/patent/US11910710B2

## CPC

- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10K 85/6576: {comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene}
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 71/164: {using vacuum deposition}
- H10K 85/342: {comprising iridium}
- H10K 2101/10: Triplet emission
- H10K 2102/103: {comprising indium oxides, e.g. ITO}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A novel organic compound with which the emission characteristics, emission efficiency, and reliability of a light-emitting element can be improved is provided. The organic compound has an imidazo[1,2-f]phenanthridine skeleton and a dibenzothiophene skeleton or a dibenzofuran skeleton bonded through an arylene group. The light-emitting element including the organic compound in a light-emitting layer shows high efficiency and low power consumption.

## Claims

### Claim 1

A light-emitting device comprising:
a first electrode;
a light-emitting layer including a first organic compound over the first electrode; and
a second electrode over the light-emitting layer,
wherein the first organic compound is represented by a formula (G1):
wherein:
R1 to R7 separately represent hydrogen, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
R8, R9, and R21 to R27 separately represent hydrogen,
Ar represents a substituted or unsubstituted biphenyldiyl group, and
Z represents a sulfur atom.

### Claim 2 (depends on 1)

The light-emitting device according to claim 1,
wherein the first organic compound is represented by the following formula:

### Claim 3 (depends on 1)

The light-emitting device according to claim 1, further comprising a second organic compound and a third organic compound in the light-emitting layer.

### Claim 4 (depends on 3)

The light-emitting device according to claim 3,
wherein the second organic compound is a phosphorescent material, and
wherein the third organic compound is a hole-transport material without an amine skeleton.

### Claim 5 (depends on 3)

The light-emitting device according to claim 3,
wherein the second organic compound is a phosphorescent material, and
wherein the third organic compound includes a carbazole skeleton.

### Claim 6 (depends on 3)

The light-emitting device according to claim 3,
wherein the second organic compound is a thermally activated delayed fluorescence.