# US 11,910,704 B2 · Organic light emitting diode device and display panel

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- Number: US 11,910,704 B2
- Document ID: US11910704B2
- Status: Granted
- Kind: B2
- Application number: 17/261,597
- Filed: 2020-08-26
- Published: 2022-06-16
- Granted: 2024-02-20
- Earliest claimed: 2020-07-06
- Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
- Inventors: Shengfang Liu; Weiwei Li; Mugyeom Kim
- Web page: https://patentgrep.com/patent/US11910704B2

## CPC

- H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots
- H10K 85/626: {containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene}
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/12: comprising dopants
- H10K 50/13: comprising stacked EL layers within one EL unit
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene}
- H10K 2101/10: Triplet emission
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic light emitting diode device and a display panel are provided. The display panel includes the organic light emitting diode device. The organic light emitting diode device includes an emitting material layer. The emitting material layer includes a first common blue-light light-emitting layer, a red-green-blue light emitting layer, and a second common blue-light light-emitting layer.

## Claims

### Claim 1

An organic light emitting diode device, comprising an emitting material layer, wherein the emitting material layer comprises:
a first common blue-light light-emitting layer;
a red-green-blue light emitting layer disposed on the first common blue-light light-emitting layer, wherein the red-green-blue light emitting layer comprises a red light emitting layer, a green light emitting layer, and a blue light emitting layer disposed side by side on a same layer; and
a second common blue-light light-emitting layer disposed on the red-green-blue light emitting layer;
wherein the red light emitting layer, the green light emitting layer, and the blue light emitting layer are quantum dot light emitting layers.

### Claim 2 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein a thickness of the red light emitting layer, a thickness of the green light emitting layer, and a thickness of the blue light emitting layer are same.

### Claim 3 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein the organic light emitting diode device comprises:
an anode layer;
a hole injection layer disposed on the anode layer;
a hole transport layer disposed on the hole injection layer;
the emitting material layer disposed on the hole transport layer;
an electron transport layer disposed on the emitting material layer; and
a cathode layer disposed on the electron transport layer.

### Claim 4 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein a host material of the second common blue-light light-emitting layer is a preferred electron type material, and its chemical formula is:
wherein R is hydrogen or is a substituent with one to twenty carbon atoms selected from the group consisting of a phenyl group derivative, a naphthalene group derivative, and an aryl group derivative, X is one selected from the group consisting of a naphthalene group derivative, a phenyl group derivative, a phenylnaphthalene derivative, and a phenylanthracene derivative monomer, and the host material of the second common blue-light light-emitting layer comprises at least one compound selected from the group consisting of anthracene dinaphthalene, anthracene dibiphenyl, anthracene naphthalene biphenyl, and anthracene diphenyl.

### Claim 5 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein a host material of the second common blue-light light-emitting layer is a preferred electron type material, and its chemical formula is:
wherein each of R1, R2, R3, R4, R5 and R6 represents a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, or a group comprising a carbonyl group with twenty or less carbon atoms, a group comprising a carbonyl ester group, an alkyl group, an alkenyl group, an alkoxyl group, a group comprising a silyl group with thirty or less carbon atoms, a group comprising an aryl group, a group comprising a heterocyclic group, a group comprising an amino group, or a derivative thereof.

### Claim 6

An organic light emitting diode device, comprising an emitting material layer, wherein the emitting material layer comprises:
a first common blue-light light-emitting layer;
a red-green-blue light emitting layer disposed on the first common blue-light light-emitting layer, wherein the red-green-blue light emitting layer comprises a red light emitting layer, a green light emitting layer, and a blue light emitting layer disposed side by side on a same layer; and
a second common blue-light light-emitting layer disposed on the red-green-blue light emitting layer;
wherein a host material of the second common blue-light light-emitting layer is a preferred electron type material, and its chemical formula is one selected from the group consisting of:

### Claim 7 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein a host material of the first common blue-light light-emitting layer is a preferred hole type material, comprising N,N′-Di-[1-naphthalenyl)-N,N′-diphenyl]1,1′-biphenyl)-4,4′-diamine, or 4,4′,4″-tris(carbazol-9-yl)-triphenylamine.

### Claim 8 (depends on 1)

The organic light emitting diode device as claimed in claim 1, wherein the first common blue-light light-emitting layer comprises a blue light fluorescent dopant, and the blue light fluorescent dopant comprises one selected from the group consisting of 4,4′-bis(2,2-diphenylvinyl)-1,1′-biphenyl, spiro-4,4′-bis(2,2′-diphenylvinyl)-1,1′-biphenyl, and spiro-6P.

### Claim 9

A display panel, comprising an organic light emitting diode device, comprising an emitting material layer, wherein the emitting material layer comprises:
a first common blue-light light-emitting layer;
a red-green-blue light emitting layer disposed on the first common blue-light light-emitting layer, wherein the red-green-blue light emitting layer comprises a red light emitting layer, a green light emitting layer, and a blue light emitting layer disposed side by side on a same layer; and
a second common blue-light light-emitting layer disposed on the red-green-blue light emitting layer;
wherein the red light emitting layer, the green light emitting layer, and the blue light emitting layer are quantum dot light emitting layers.