# US 12,765,256 B2 · Organic electric element, display panel comprising the same and display device comprising the same

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- Number: US 12,765,256 B2
- Document ID: US12765256B2
- Status: Granted
- Kind: B2
- Application number: 17/137,008
- Filed: 2020-12-29
- Published: 2021-07-01
- Granted: 2026-10-13
- Earliest claimed: 2019-12-31
- Assignees: LG Display Co., Ltd.; LG Chem, Ltd.
- Applicants: LG Display Co., Ltd.; LG Chem, Ltd.
- Inventors: Jicheol Shin; Seonkeun Yoo; Jeongdae Seo; Shinhan Kim; JooYong Yoon; Jun Yun; DongHeon Kim; YongHan Lee; SungJae Lee
- Web page: https://patentgrep.com/patent/US12765256B2

## CPC

- H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene}
- C09K 11/06: containing organic luminescent materials
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom}
- H10K 85/636: {comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom}
- H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)}
- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- C09K 2211/1007: Non-condensed systems
- C09K 2211/1011: Condensed systems
- C09K 2211/1018: Heterocyclic compounds
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/125: specially adapted for multicolour light emission, e.g. for emitting white light
- H10K 50/17: Carrier injection layers
- H10K 50/19: Tandem OLEDs
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 85/624: {containing six or more rings}
- H10K 85/626: {containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene}
- H10K 2101/30: Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
- H10K 2101/40: Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

Provided are an organic electric element, a display panel and a display device including the organic electric element which include a charge generating layer including a first layer comprising a first compound and a second compound and a second layer comprising a third compound so that they may have excellent efficiency or lifespan.

## Claims

### Claim 1

An organic electric element comprising:
a first electrode;
a second electrode; and
an organic layer positioned between the first electrode and the second electrode, wherein the organic layer comprises a first stack comprising a first light emitting layer, a second stack comprising a second light emitting layer, and a charge generating layer positioned between the first stack and the second stack,
the charge generating layer comprises a first layer and a second layer,
the first layer comprises a first compound selected from A15, A18, A21, A24, A38, A39, A41 and A42, and a second compound, and
the second layer comprises a third compound,
the second compound selected from 4-5, 4-6, 4-11, 4-12, 4-17, 4-18, 4-23, 4-24, 5-4-5-6, 5-10-5-12, 5-16-5-18 and 5-22-5-24,
the third compound selected from E01, E04, E06, E07-E15, and E21,

### Claim 2 (depends on 1)

The organic electric element according to claim 1, wherein the first electrode is an anode electrode, the second electrode is a cathode, and first layer is positioned between the second layer and the second electrode.

### Claim 3 (depends on 1)

The organic electric element according to claim 1, wherein the following general formula 1 is satisfied:
L3-L1≤2.1 eV [general formula 1]
In the general formula 1,
L3 is the LUMO (Lowest Unoccupied Molecular Orbital) energy level of the third compound, and
L1 is the LUMO energy level of the first compound.

### Claim 4 (depends on 1)

The organic electric element according to claim 1, wherein the following general formula 2 is satisfied:
L3-H1≤2.8 eV [general formula 2]
In the general formula 2,
L3 is the LUMO (Lowest Unoccupied Molecular Orbital) energy level of the third compound, and
H1 is the HOMO (Highest Occupied Molecular Orbital) energy level of the second compound.

### Claim 5 (depends on 1)

The organic electric element according to claim 1, wherein the following general formula 3 is satisfied:
0.32 eV≤L1-H2≤0.8 eV [general formula 3]
in the general formula 3,
L1 is the LUMO (Lowest Unoccupied Molecular Orbital) energy level of the first compound, and
H2 is the HOMO (Highest Unoccupied Molecular Orbital) energy level of the first compound.

### Claim 6 (depends on 1)

A display panel comprising a subpixel comprising the organic electric element of claim 1.

### Claim 7 (depends on 6)

A display device comprising;
the display panel of claim 6; and
a driving circuit for driving the display panel.

### Claim 8 (depends on 1)

The organic electric element according to claim 1, wherein the organic layer comprises a hole injection layer located between the first electrode and the first light emitting layer and
the hole injection layer comprises a fourth compound selected from the group consisting of A15, A18, A21, A24, A38, A39, A41, and A42, and a fifth compound selected from 4-5, 4-6, 4-11, 4-12, 4-17, 4-18, 4-23, 4-24, 5-4-5-6, 5-10-5-12, 5-16-5-18 and 5-22-5-24.

### Claim 9 (depends on 8)

The organic electric element according to claim 8, wherein the fourth compound is the same compound as the first compound, and the fifth compound is the same organic compound as the second compound.