# US 12,604,662 B2 · Light-emitting device and light-emitting apparatus

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- Number: US 12,604,662 B2
- Document ID: US12604662B2
- Status: Granted
- Kind: B2
- Application number: 17/863,025
- Filed: 2022-07-12
- Published: 2023-03-09
- Granted: 2026-04-14
- Earliest claimed: 2021-07-16
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Sachiko Kawakami; Yui Yoshiyasu; Nobuharu Ohsawa; Tsunenori Suzuki; Toshiki Sasaki; Naoaki Hashimoto; Tomohiro Kubota; Satoshi Seo
- Web page: https://patentgrep.com/patent/US12604662B2

## CPC

- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- H10K 85/636: {comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom}
- H10K 85/657: {Polycyclic condensed heteroaromatic hydrocarbons}
- 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 50/157: {between the light-emitting layer and the cathode}
- H10K 50/166: {comprising a multilayered structure}
- H10K 50/18: Carrier blocking layers
- H10K 2101/10: Triplet emission
- H10K 2101/90: {Multiple hosts in the emissive layer}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A light-emitting device having favorable heat resistance is provided. The light-emitting device includes an anode, a cathode, and an EL layer positioned between the first anode and the cathode. The EL layer includes a light-emitting layer and a first layer. The first layer is positioned between the light-emitting layer and the cathode. The light-emitting layer and the first layer are in contact with each other. The light-emitting layer contains a first organic compound, a second organic compound, and a light-emitting substance. The first layer contains a third organic compound. The first organic compound and the third organic compound each have an electron-transport property. The second organic compound has a hole-transport property. The light-emitting substance emits red light. The first organic compound is represented by General Formula (G100). The third organic compound is represented by General Formula (G300).

## Claims

### Claim 1

A light-emitting apparatus comprising:
a first light-emitting device and a second light-emitting device that are adjacent to each other over an insulating surface,
wherein the first light-emitting device comprises a first anode, a first cathode, and a first EL layer interposed between the first anode and the first cathode,
wherein the second light-emitting device comprises a second anode, a second cathode, and a second EL layer interposed between the second anode and the second cathode,
wherein the first EL layer comprises a first light-emitting layer and a first layer,
wherein the first layer is positioned between the first light-emitting layer and the first cathode,
wherein the second EL layer comprises a second light-emitting layer,
wherein the first light-emitting layer comprises a first organic compound, a second organic compound, and a first light-emitting substance,
wherein the first layer comprises a third organic compound,
wherein the second light-emitting layer comprises a second light-emitting substance,
wherein the first light-emitting substance emits red light,
wherein a distance between an end portion of the first light-emitting layer and an end portion of the second light-emitting layer facing each other is greater than or equal to 2 μm and less than or equal to 5 μm,
wherein the first organic compound comprises a condensed heteroaromatic ring skeleton comprising a diazine ring, and
wherein the third organic compound comprises a bicarbazole skeleton and a heteroaromatic ring skeleton comprising one selected from a pyridine ring, a diazine ring, and a triazine ring.

### Claim 2 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the third organic compound comprises a bicarbazole skeleton and a condensed heteroaromatic ring skeleton comprising a pyridine ring or a diazine ring.

### Claim 3 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the first organic compound is represented by General Formula (G100),
wherein Q represents an oxygen atom or a sulfur atom,
wherein Ar1 represents a substituted or unsubstituted aromatic ring or a substituted or unsubstituted condensed aromatic ring,
wherein each of R101 and R102 independently represents hydrogen or a group comprising 1 to 100 carbon atoms in total, and
wherein at least one of R101 and R102 comprises a skeleton having a hole-transport property.

### Claim 4 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the third organic compound is represented by General Formula (G300),
wherein A300 represents any of a heteroaromatic ring comprising a pyridine skeleton, a heteroaromatic ring comprising a diazine skeleton, and a heteroaromatic ring comprising a triazine skeleton,
wherein each of R301 to R315 independently represents hydrogen, a substituted or unsubstituted alkyl group comprising 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group comprising 5 to 7 carbon atoms, a substituted or unsubstituted aryl group comprising 6 to 13 carbon atoms in a skeleton, or a substituted or unsubstituted heteroaryl group comprising 3 to 13 carbon atoms in a skeleton, and
wherein Ar300 represents a substituted or unsubstituted arylene group comprising 6 to 25 carbon atoms, or a single bond.

### Claim 5 (depends on 1)

The light-emitting apparatus according to claim 1,
wherein the second organic compound is represented by General Formula (G200),
wherein each of Ar201 and Ar202 independently represents a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted spirofluorenyl group, or a substituted or unsubstituted biphenyl or terphenyl group, and
wherein Ar203 represents a substituent comprising a carbazole skeleton.

### Claim 6 (depends on 1)

The light-emitting apparatus according to claim 1, wherein the first light-emitting substance emits phosphorescent light.

### Claim 7

A light-emitting apparatus comprising:
a first light-emitting device and a second light-emitting device that are adjacent to each other over an insulating surface,
wherein the first light-emitting device comprises a first anode, a first cathode, and a first EL layer interposed between the first anode and the first cathode,
wherein the second light-emitting device comprises a second anode, a second cathode, and a second EL layer interposed between the second anode and the second cathode,
wherein the first EL layer comprises a first light-emitting layer,
wherein the second EL layer comprises a second light-emitting layer,
wherein the first light-emitting layer comprises a first organic compound, a second organic compound, and a first light-emitting substance,
wherein the second light-emitting layer comprises a second light-emitting substance,
wherein the first light-emitting substance emits red light,
wherein a distance between an end portion of the first light-emitting layer and an end portion of the second light-emitting layer facing each other is greater than or equal to 2 μm and less than or equal to 5 μm,
wherein the first organic compound is represented by General Formula (G100),
wherein Q represents an oxygen atom or a sulfur atom,
wherein Ar1 represents a substituted or unsubstituted aromatic ring or a substituted or unsubstituted condensed aromatic ring,
wherein each of R101 and R102 independently represents hydrogen or a group comprising 1 to 100 carbon atoms in total, and
wherein at least one of R101 and R102 comprises a skeleton having a hole-transport property.

### Claim 8 (depends on 7)

The light-emitting apparatus according to claim 7,
wherein the second organic compound is represented by General Formula (G200),
wherein each of Ar201 and Ar202 independently represents a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted spirofluorenyl group, or a substituted or unsubstituted biphenyl or terphenyl group, and
wherein Ar203 represents a substituent comprising a carbazole skeleton.

### Claim 9 (depends on 7)

The light-emitting apparatus according to claim 7, wherein the first light-emitting substance emits phosphorescent light.

### Claim 10

A light-emitting apparatus comprising:
a first light-emitting device and a second light-emitting device that are adjacent to each other over an insulating surface,
wherein the first light-emitting device comprises a first anode, a first cathode, and a first EL layer interposed between the first anode and the first cathode,
wherein the second light-emitting device comprises a second anode, a second cathode, and a second EL layer interposed between the second anode and the second cathode,
wherein the first EL layer comprises a first light-emitting layer and a first layer,
wherein the first layer is positioned between the first light-emitting layer and the first cathode,
wherein the second EL layer comprises a second light-emitting layer,
wherein the first light-emitting layer comprises a first organic compound, a second organic compound, and a first light-emitting substance,
wherein the first layer comprises a third organic compound,
wherein the second light-emitting layer comprises a second light-emitting substance,
wherein the first light-emitting substance emits red light,
wherein a distance between an end portion of the first light-emitting layer and an end portion of the second light-emitting layer facing each other is greater than or equal to 2 μm and less than or equal to 5 μm,
wherein the first organic compound is represented by General Formula (G100),
wherein Q represents an oxygen atom or a sulfur atom,
wherein Ar1 represents a substituted or unsubstituted aromatic ring or a substituted or unsubstituted condensed aromatic ring,
wherein each of R101 and R102 independently represents hydrogen or a group comprising 1 to 100 carbon atoms in total,
wherein at least one of R101 and R102 comprises a skeleton having a hole-transport property,
wherein the second organic compound is represented by General Formula (G200),
wherein each of Ar201 and Ar202 independently represents a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted spirofluorenyl group, or a substituted or unsubstituted biphenyl or terphenyl group,
wherein Ar203 represents a substituent comprising a carbazole skeleton,
wherein the third organic compound is represented by General Formula (G300),
wherein A300 represents any of a heteroaromatic ring comprising a pyridine skeleton, a heteroaromatic ring comprising a diazine skeleton, and a heteroaromatic ring comprising a triazine skeleton,
wherein each of R301 to R315 independently represents hydrogen, a substituted or unsubstituted alkyl group comprising 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group comprising 5 to 7 carbon atoms, a substituted or unsubstituted aryl group comprising 6 to 13 carbon atoms in a skeleton, or a substituted or unsubstituted heteroaryl group comprising 3 to 13 carbon atoms in a skeleton, and
wherein Ar300 represents a substituted or unsubstituted arylene group comprising 6 to 25 carbon atoms, or a single bond.

### Claim 11 (depends on 10)

The light-emitting apparatus according to claim 10, wherein the first light-emitting substance emits phosphorescent light.