# US 2020/0287142 A1 · Organic light-emitting device

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- Number: US 2020/0287142 A1
- Document ID: US20200287142A1
- Status: Published application
- Kind: A1
- Application number: 16/646,960
- Filed: 2019-05-03
- Published: 2020-09-10
- Earliest claimed: 2018-06-18
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Jungoh HUH; Sangbin LEE; Sung Kil HONG
- Web page: https://patentgrep.com/patent/US20200287142A1

## CPC

- H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene}
- 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 85/6574: {comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes}
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 50/13: comprising stacked EL layers within one EL unit
- H10K 50/16: Electron transporting layers
- H10K 50/165: comprising dopants
- H10K 50/171: {Electron injection layers}
- H10K 50/18: Carrier blocking layers
- H10K 2101/10: Triplet emission
- H10K 2101/27: {Combination of fluorescent and phosphorescent emission}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Provided is an organic light emitting device including a cathode; an anode provided opposite to the cathode; a light emitting layer provided between the cathode and the anode; and an organic material layer provided between the cathode and the light emitting layer, and including Compound (A) including a heteroatom and a cyano group, wherein Compound (A) satisfies Equation 1 and Equation 2: |PElCN|≥3debye Equation 1 wherein: |PElCN| means an absolute value of a dipole moment of Compound (A);  P EI C  N   P EI  >  Ea EI CN   Ea EI  Equation   2 wherein: |PElCN| means an absolute value of a dipole moment of Compound (A); |PEl| means an absolute value of a dipole moment of a compound having the same core as the compound of |PElCN| without including a cyano group; |EaElCN| means an absolute value of electron affinity of Compound (A); and |EaEl| means an absolute value of electron affinity of a compound having the same core as the compound of |EaElCN| without including a cyano group.

## Claims

### Claim 1

An organic light emitting device comprising:
a cathode;
an anode provided opposite to the cathode;
one or more of a light emitting layer provided between the cathode and the anode; and
an organic material layer provided between the cathode and the light emitting layer, and including Compound (A) including a heteroatom and a cyano group,
wherein Compound (A) satisfies the following Equation 1 and the following Equation 2:
|PElCN|≥3debye Equation 1
wherein in Equation 1:
|PElCN| means an absolute value of a dipole moment of Compound (A);

P
EI
C

N


P
EI

>

Ea
EI
CN


Ea
EI

Equation


2
wherein in Equation 2:
|PElCN| means an absolute value of a dipole moment of Compound (A);
|PEl| means an absolute value of a dipole moment of a compound having the same core as the compound of |PElCN| without including a cyano group;
|EaElCN| means an absolute value of electron affinity of Compound (A); and
|EaEl| means an absolute value of electron affinity of a compound having the same core as the compound of |EaElCN| without including a cyano group.

### Claim 2 (depends on 1)

The organic light emitting device of claim 1, wherein the organic material layer is a hole blocking layer, an electron transfer layer, an electron injection layer, or an electron injection and transfer layer.

### Claim 3 (depends on 1)

The organic light emitting device of claim 1, further comprising a hole blocking layer provided between the light emitting layer and the organic material layer,
wherein the hole blocking layer is provided adjoining the light emitting layer; and the organic material layer is an electron injection and transfer layer.

### Claim 4 (depends on 1)

The organic light emitting device of claim 1, wherein Compound (A) has electron mobility of greater than or equal to 10−12 cm2/Vs and less than or equal to 102 cm2/Vs under an electric field condition of 0.1 MV/cm.

### Claim 5 (depends on 1)

The organic light emitting device of claim 1, wherein the organic material layer has a glass transition temperature (Tg) of higher than 100° C. and lower than or equal to 200° C.

### Claim 6 (depends on 1)

The organic light emitting device of claim 1, wherein the light emitting layer includes a host and a dopant, and the dopant has a maximum light emission wavelength in a range of 420 nm to 520 nm.

### Claim 7 (depends on 6)

The organic light emitting device of claim 6, wherein the dopant is a blue fluorescent dopant.

### Claim 8 (depends on 1)

The organic light emitting device of claim 1, wherein the organic material layer further includes a metal complex, and includes Compound (A):the metal complex in a weight ratio of 1:9 to 9:1.

### Claim 9 (depends on 1)

The organic light emitting device of claim 1, wherein Compound (A) is a compound including a heteroring including at least one N.

### Claim 10 (depends on 1)

The organic light emitting device of claim 1, comprising two or more light emitting layers.

### Claim 11 (depends on 10)

The organic light emitting device of claim 10, wherein at least two of the two or more light emitting layers have a different maximum light emission wavelength.

### Claim 12 (depends on 10)

The organic light emitting device of claim 10, wherein at least one of the two or more light emitting layers includes a phosphorescent dopant, and at least one of the light emitting layers includes a fluorescent dopant.

### Claim 13 (depends on 1)

The organic light emitting device of claim 1, comprising:
a first light emitting layer provided between the anode and the organic material layer including Compound (A); and
a second light emitting layer provided on the first light emitting layer.

### Claim 14 (depends on 1)

The organic light emitting device of claim 1, comprising:
a first light emitting layer provided on a part of between the anode and the organic material layer including Compound (A); and
a second light emitting layer provided on the remaining part of between the anode and the organic material layer including Compound (A).

### Claim 15 (depends on 1)

The organic light emitting device of claim 1, comprising:
a first light emitting layer provided between the anode and the organic material layer including Compound (A);
a second light emitting layer provided on the first light emitting layer; and
a third light emitting layer provided on the second light emitting layer.