ORGANIC ELECTROLUMINESCENT DEVICE

• US 20150333292A1
• Filed: 05/05/2015
• Published: 11/19/2015
• Est. Priority Date: 05/13/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: SATO, Toshihiro
• Granted Patent: US 9,704,933 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/00 Constructional details relating to the organic devices covered by this subclass
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 77/10 Substrates, e.g. flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

In an organic electroluminescent device, deterioration of an organic material layer of an OLED due to moisture and the like from a surrounding material is effectively prevented. An OLED is provided with an organic material layer including a light emitting layer and is provided on a lower substrate. A first diamond-like carbon layer is provided between the lower substrate and the organic material layer and is at least arranged in a light emitting area in a surface along the lower substrate. A second diamond-like carbon layer is provided above the organic material layer and is at least arranged in the light emitting area.

Claims

1. An organic electroluminescent device comprising:

a light emitting element provided with an organic material layer including a light emitting layer and provided on a substrate;

a first diamond-like carbon layer provided between the substrate and the organic material layer and at least arranged in a light emitting area in a surface along the substrate; and

a second diamond-like carbon layer provided above the organic material layer and at least arranged in the light emitting area.

2. The organic electroluminescent device according to claim 1, wherein

the light emitting element includes a lower electrode and an upper electrode between which the organic material layer is sandwiched and which apply an electric signal to the organic material layer, and

the first diamond-like carbon layer is arranged to contact a lower surface of the lower electrode.

3. The organic electroluminescent device according to claim 1, wherein

the light emitting element includes a lower electrode and an upper electrode between which the organic material layer is sandwiched and which apply an electric signal to the organic material layer, and

the second diamond-like carbon layer is arranged to contact an upper surface of the upper electrode.

4. The organic electroluminescent device according to claim 1, wherein

the organic electroluminescent device is an organic electroluminescence display device in which the light emitting element is provided in each of a plurality of pixels two-dimensionally arranged in a display area, and

each of the first diamond-like carbon layer and the second diamond-like carbon layer is integrally provided over the plurality of pixels.

5. The organic electroluminescent device according to claim 4, wherein

the light emitting element includes an upper electrode integrally provided over the plurality of pixels on the organic material layer, and a lower electrode provided for each of the pixels under the organic material layer, and

the second diamond-like carbon layer has conductivity and is arranged to contact an upper surface of the upper electrode.

6. The organic electroluminescent device according to claim 4, wherein the first diamond-like carbon layer and the second diamond-like carbon layer are closed in contact with each other at an outside of an edge of the display area or through another inorganic material.