# US 12,004,364 B2 · Light-emitting device and apparatus including same

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- Number: US 12,004,364 B2
- Document ID: US12004364B2
- Status: Granted
- Kind: B2
- Application number: 18/218,563
- Filed: 2023-07-05
- Published: 2023-11-02
- Granted: 2024-06-04
- Earliest claimed: 2020-04-09
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Dongchan Kim; Jiyoung Moon; Heechang Yoon; Jihye Lee; Hakchoong Lee; Haemyeong Lee; Myungsuk Han; Jihwan Yoon; Jonghyuk Lee; Yoonhyeung Cho
- Web page: https://patentgrep.com/patent/US12004364B2

## CPC

- H10K 50/19: Tandem OLEDs
- H10K 50/15: Hole transporting layers
- H10K 50/16: Electron transporting layers
- H10K 50/17: Carrier injection layers
- H10K 50/171: {Electron injection layers}
- H10K 59/40: OLEDs integrated with touch screens
- H10K 50/165: comprising dopants
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- 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}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A light-emitting device and an apparatus including the same include a first electrode, a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes m emission units and (m-1) charge generating units, each of the charge generating units being between the emission units that are adjacent to each other, m is a natural number of 2 or greater, at least one of the (m-1) charge generating units includes an n-type charge generating layer, a p-type charge generating layer, and a p-type hole injection layer, wherein the n-type charge generating layer includes an n-type organic compound and a metal material, and wherein the p-type charge generating layer and the p-type hole injection layer each independently include an inorganic semiconductor material.

## Claims

### Claim 1

A light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode,
wherein the organic layer includes a first emission layer, a second emission layer, and a charge generating unit between the first emission layer and the second emission layer,
the charge generating unit includes an n-type charge generating layer, a p-type charge generating layer, and a p-type hole injection layer,
wherein the n-type charge generating layer includes an n-type organic compound and a metal material,
the n-type organic compound includes a phenanthrene-based compound, a phosphine oxide-based compound and/or a phenanthroline-based compound,
the metal material includes at least one metal selected from an alkali metal, an alloy of an alkali metal, an alkaline earth metal, an alloy of an alkaline earth metal, a lanthanide metal, and an alloy of a lanthanide metal,
the p-type charge generating layer and the p-type hole injection layer each independently include an inorganic semiconductor material,
the inorganic semiconductor material included in the p-type charge generating layer and the inorganic semiconductor material included in the p-type hole injection layer each independently include a halide of a transition metal, a halide of a post-transition metal, bismuth, tellurium, a halide of bismuth, a sulfide of bismuth, a selenide of bismuth, a telluride of bismuth, a telluride of a transition metal, a telluride of a post-transition metal, a sulfide of a transition metal, a sulfide of a post-transition metal, a selenide of a transition metal, a selenide of a post-transition metal, or any combination thereof, and
the inorganic semiconductor material included in the p-type charge generating layer is substantially identical to or different from the inorganic semiconductor material included in the p-type hole injection layer.

### Claim 2 (depends on 1)

The light-emitting device of claim 1, wherein the metal material included in the n-type charge generating layer has at least one component selected from lithium (Li), sodium (Na), a Bi—Li alloy, a Bi—Na alloy, ytterbium (Yb), samarium (Sm), europium (Eu), terbium (Tb), holmium (Ho), and dysprosium (Dy).

### Claim 3 (depends on 1)

The light-emitting device of claim 1, wherein a binding energy between the n-type organic compound and the metal material included in the n-type charge generating layer is 1.25 electron volts (eV) or higher.

### Claim 4 (depends on 1)

The light-emitting device of claim 1, wherein a volume ratio of the n-type organic compound to the metal material included in the n-type charge generating layer is in a range of about 99.9:0.1 to about 80:20.

### Claim 5 (depends on 1)

The light-emitting device of claim 1, wherein the p-type charge generating layer and the p-type hole injection layer each independently further include a hole transporting organic compound.

### Claim 6 (depends on 5)

The light-emitting device of claim 5, wherein the hole transporting organic compound included in the p-type charge generating layer and the hole transporting organic compound included in the p-type hole injection layer each independently have at least one selected from a compound represented by Formula 201 and a compound represented by Formula 202:
wherein, in Formulae 201 and 202,
L201 to L204 are each independently selected from a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,
L205 is selected from *—O—*′, *—S—*′,*—N(Q201)-*′, a substituted or unsubstituted C1-C20 alkylene group, a substituted or unsubstituted C2-C20 alkenylene group, a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,
xa1 to xa4 are each independently an integer from 0 to 3,
xa5 is an integer from 1 to 10, and
R201 to R204 and Q201 are each independently selected from a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

### Claim 7 (depends on 5)

The light-emitting device of claim 5, wherein a volume ratio of the hole transporting organic compound to the inorganic semiconductor material in the p-type charge generating layer and a volume ratio of the hole transporting organic compound to the inorganic semiconductor material in the p-type hole injection layer are each independently in a range of about 99.9:0.1 to about 80:20.

### Claim 8 (depends on 1)

The light-emitting device of claim 1, wherein the organic layer further includes a hole transport region and an electron transport region, and the electron transport region includes an inorganic insulating material.

### Claim 9 (depends on 8)

The light-emitting device of claim 8, wherein the electron transport region includes an n-type electron injection layer, and the n-type electron injection layer includes the inorganic insulating material.

### Claim 10 (depends on 9)

The light-emitting device of claim 9, wherein the n-type electron injection layer is in direct contact with the second electrode.

### Claim 11 (depends on 8)

The light-emitting device of claim 8, wherein the inorganic insulating material includes a halide of an alkali metal, a halide of an alkaline earth metal, a halide of a lanthanide metal, or any combination thereof.

### Claim 12 (depends on 9)

The light-emitting device of claim 9, wherein the n-type electron injection layer consists of the inorganic insulating material.

### Claim 13 (depends on 9)

The light-emitting device of claim 9, wherein the n-type electron injection layer further includes a metal dopant, and
the metal dopant includes at least one selected from an alkali metal, an alloy of an alkali metal, an alkaline earth metal, an alloy of an alkaline earth metal, a lanthanide metal, and an alloy of a lanthanide metal.

### Claim 14 (depends on 13)

The light-emitting device of claim 13, wherein the metal dopant is selected from ytterbium (Yb), samarium (Sm), lithium (Li), and magnesium (Mg).

### Claim 15 (depends on 13)

The light-emitting device of claim 13, wherein a volume ratio of the inorganic insulating material to the metal dopant is in a range of about 100:0 to about 70:30.

### Claim 16 (depends on 1)

An apparatus comprising:
a thin-film transistor including a source electrode, a drain electrode, and an active layer; and a light-emitting device according to claim 1,
wherein the first electrode of the light-emitting device is electrically connected to one of the source electrode and the drain electrode of the thin-film transistor.

### Claim 17 (depends on 16)

The apparatus of claim 16, further comprising:
a color filter, wherein the color filter is on a pathway of light emitted from the light-emitting device.