ORGANIC LIGHT-EMITTING DEVICE

Abstract

A organic light-emitting device includes a substrate including at least a base material, at least one organic light-emitting element which includes (a) a pair of electrodes provided on the substrate and an organic compound layer disposed between the pair of electrodes, and (b) provides a light-emitting area, an inorganic sealing layer provided on the organic light-emitting element and the surface of the substrate, and an adhesion layer which is provided between the substrate and the inorganic sealing layer and only on the periphery of the light-emitting area for closely contacting the surface of the substrate and the inorganic sealing layer, and inhibits moisture from intruding at an edge of the inorganic sealing layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view showing an organic light-emitting device according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view showing an organic light-emitting device according to another embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view showing an organic light-emitting device according to another embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view showing an example of a position where an adhesion layer of the present invention is formed.

FIG. 5 is a schematic cross-sectional view showing another example of a position where the adhesion layer of the present invention is formed.

FIG. 6 is a schematic cross-sectional view showing another example of a position where the adhesion layer of the present invention is formed.

FIG. 7 is a schematic top view showing an example of a position where the adhesion layer of the present invention is formed.

FIG. 8 is a schematic top view showing another example of a position where the adhesion layer of the present invention is formed.

FIG. 9 is a schematic cross-sectional view showing another example of a position where the adhesion layer of the present invention is formed.

FIG. 10 is a schematic cross-sectional view showing the outline of the structure of a substrate for evaluation in Example 1.

FIG. 11 is a schematic cross-sectional view showing the outline of the structure of a substrate for evaluation in Reference Example 1.

FIG. 12 is a schematic cross-sectional view showing the outline of the structure of a substrate for evaluation in Example 3.

FIG. 13 is a schematic cross-sectional view showing the outline of the structure of a substrate for evaluation in Example 4.

FIG. 14 is a schematic cross-sectional view showing the outline of the structure of a substrate for evaluation in Reference Example 2.

Claims

1. An organic light-emitting device comprising: a substrate including at least a base material;at least one organic light-emitting element which includes (a) a pair of electrodes provided on the substrate and an organic compound layer disposed between the pair of electrodes, and (b) provides a light-emitting area;an inorganic sealing layer provided on the organic light-emitting element and the surface of the substrate; andan adhesion layer which is provided between the substrate and the inorganic sealing layer and only on the periphery of the light-emitting area for closely contacting the surface of the substrate and the inorganic sealing layer, and inhibits moisture from intruding at an edge of the inorganic sealing layer.

2. The organic light-emitting device according to claim 1, wherein the inorganic sealing layer is light-transmitting, and light emitted from the organic compound layer is conducted to the exterior of the device through the inorganic sealing layer.

3. The organic light-emitting device according to claim 1, wherein the adhesion layer is covered with the inorganic sealing layer.

4. The organic light-emitting device according to claim 1, wherein the adhesion layer comprises diamond-like carbon or an inorganic material containing at least one element of In, Sn, Zn, or Si.

5. The organic light-emitting device according to claim 4, wherein the adhesion layer comprises indium tin oxide (ITO).

6. The organic light-emitting device according to claim 1, wherein the material of the adhesion layer is the same as the material of at least one of the pair of electrodes.

7. The organic light-emitting device according to claim 1, further comprising a second sealing layer provided on the inorganic sealing layer.

8. The organic light-emitting device according to claim 1, wherein the substrate has a side formed by dividing the substrate, and the inorganic sealing layer is disposed so as to extend from the organic light-emitting element to the side.

9. The organic light-emitting device according to claim 1, wherein the organic light-emitting device is an active matrix light-emitting device, and the substrate includes a plurality of switching elements provided on the base material.