# US 2014/0151663 A1 · Organic electroluminescence device

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- Number: US 2014/0151663 A1
- Document ID: US20140151663A1
- Status: Published application
- Kind: A1
- Application number: 14/092,327
- Filed: 2013-11-27
- Published: 2014-06-05
- Earliest claimed: 2012-11-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Mitsuhiro KASHIWABARA
- Web page: https://patentgrep.com/patent/US20140151663A1

## CPC

- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/805: {Electrodes}
- H10K 59/8052: {Cathodes}
- H10K 59/878: {comprising reflective means}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An organic EL device having a red light emitting area and a green light emitting area is provided. Each of the red light emitting area and the green light emitting area has a structure such that a first electrode having a light transmitting characteristic and an organic layer formed on the first electrode are stacked, and a second electrode having a light reflecting characteristic is disposed on the organic layers of the red and green light emitting areas. Reflectance of green light by the second electrode in the red light emitting area is smaller than reflectance of green light in the second electrode of the green light emitting area. Reflectance of red light by the second electrode of the red light emitting area is larger than reflectance of red light by the second electrode of the green light emitting area.

## Claims

### Claim 1

An organic EL device comprising:
a red light emitting area including a first red electrode having a light transmitting characteristic and an organic layer, the first red electrode and the organic layer being stacked;
a green light emitting area including a first green electrode having a light transmitting characteristic and an organic layer, the first green electrode and the organic layer being stacked; and
a second electrode on the organic layer of the red light emitting area and on the organic layer of the green light emitting area, the second electrode having a light reflecting characteristic,
wherein reflectance of green light by the second electrode of the red light emitting area is smaller than reflectance of green light by the second electrode of the green light emitting area; and
wherein reflectance of red light by the second electrode of the red light emitting area is larger than reflectance of red light by the second electrode of the green light emitting area.

### Claim 2 (depends on 1)

The organic EL device as claimed in claim 1, wherein the second electrode of the red light emitting area comprises a layer including copper.

### Claim 3 (depends on 2)

The organic EL device as claimed in claim 2, wherein a thickness of the layer including the copper is between 5 nm and 50 nm and the second electrode of the red light emitting area is formed on the layer including copper and of a material including aluminum or silver.

### Claim 4 (depends on 3)

The organic EL device as claimed in claim 3, wherein the organic layers of the red and green light emitting areas are used in common except for a light emitting layer.

### Claim 5 (depends on 1)

The organic EL device as claimed in claim 1, wherein the red reflectance is centered on light having a wavelength of 620 nm.

### Claim 6 (depends on 5)

The organic EL device as claimed in claim 5, wherein the green reflectance is centered on light having a wavelength of 550 nm.

### Claim 7 (depends on 1)

The organic EL device as claimed in claim 1, wherein the second electrode of the red light emitting area comprises a layer including gold.

### Claim 8 (depends on 7)

The organic EL device as claimed in claim 7, wherein the second electrode of the red light emitting area is formed on the layer including gold and of a material including aluminum or silver.

### Claim 9 (depends on 8)

The organic EL device as claimed in claim 8, wherein the organic layers of the red and green light emitting areas are used in common except for a light emitting layer.