Organic electroluminescence apparatus, manufacturing method for same, illumination apparatus, and display apparatus

Patent metadata

Field	Value
Publication number	US-10090489-B2
Application number	US-201515506285-A
Country	US
Kind code	B2
Filing date	Aug 20, 2015
Priority date	Aug 26, 2014
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

An organic EL device according to one aspect of the present invention includes: a base material in which a recess is provided at an upper surface of the base material; a reflective layer that is provided at least along a surface of the recess; a filling layer that is filled into an inside of the recess via the reflective layer, the filling layer having light transmissivity; a first electrode that is provided at least on a layer above the filling layer, the first electrode having light transmissivity; an organic layer that is provided on a layer above the first electrode, the organic layer comprising at least a light-emitting layer; and a second electrode that is provided on a layer above the organic layer, the second electrode having light transmissivity and light reflectivity. A part of the reflective layer contacts a part of the first electrode.

First claim

The invention claimed is:

1. An organic electroluminescence device comprising:
a base material in which a recess is provided at an upper surface of the base material;
a reflective layer that is provided at least along a surface of the recess;
a filling layer that is filled into an inside of the recess via the reflective layer, the filling layer having light transmissivity;
a first electrode that is provided at least on a layer above the filling layer, the first electrode having light transmissivity;
an organic layer that is provided on a layer above the first electrode, the organic layer comprising at least a light-emitting layer; and
a second electrode that is provided on a layer above the organic layer, the second electrode having light transmissivity and light reflectivity,
wherein one of a first condition and a second condition is satisfied,
the first condition is that a part of the reflective layer contacts a part of the first electrode, and
the second condition is that a lower surface of the first electrode at a position in the recess is positioned lower than a plane that includes the upper surface of the base material.

2. The organic electroluminescence device according to claim 1 ,
wherein a lower surface of the light-emitting layer at a position in the recess is positioned below a plane that includes the upper surface of the base material.

3. The organic electroluminescence device according to claim 1 ,
wherein the second electrode is constituted by a metal film.

4. The organic electroluminescence device according to claim 1 ,
wherein a cross-section shape of the recess cut by an arbitrary plane that is perpendicular to the upper surface of the base material is an arc.

5. The electroluminescence device according to claim 1 ,
wherein the first electrode is provided so as to contact an upper surface of the filling layer, and
a refractive index of the filling layer is substantially same as a refractive index of the first electrode.

6. The electroluminescence device according to claim 1 ,
wherein a refractive index of the filling layer is substantially same as a refractive index of the light-emitting layer.

7. The electroluminescence device according to claim 1 ,
wherein the reflective layer is constituted by a multilayer dielectric film.

8. The electroluminescence device according to claim 1 ,
wherein the reflective layer has light scattering properties.

9. The electroluminescence device according to claim 1 ,
wherein the electroluminescence device comprises a plurality of unit light-emitting regions,
the recess comprises at least a first recess and a second recess having mutually different shapes, and
the first recess and second recess are provided within one unit light-emitting region.

10. The electroluminescence device according to claim 1 ,
wherein the electroluminescence device comprises a plurality of unit light-emitting regions,
the recess comprises at least a first recess and a second recess having mutually different shapes,
the plurality of unit light-emitting regions comprise at least a first unit light-emitting region having the first recess and a second unit light-emitting region having the second recess.

11. The electroluminescence device according to claim 10 ,
wherein the first unit light-emitting region and the second unit light-emitting region are each driven independently.

12. A method for manufacturing an organic electroluminescence device, the method comprising:
forming a recess at an upper surface of a base material;
forming a reflective layer at least along a surface of the recess;
forming a filling layer inside the recess via the reflective layer, the filling layer having light transmissivity;
forming a first electrode at least on a layer above the filling layer, the first electrode having light transmissivity;
forming an organic layer on a layer above the first electrode, the organic layer comprising at least a light-emitting layer; and
forming a second electrode on a layer above the organic layer, the second electrode having light transmissivity and light reflectivity,
wherein one of a first condition and a second condition is satisfied,
the first condition is that, in the forming of the first electrode, the first electrode is formed so that a part of the first electrode contacts a part of the reflective layer, and
the second condition is that, in the forming of the first electrode, the first electrode is formed so that a lower surface of the first electrode in a position in the recess is positioned lower than a plane that includes the upper surface of the base material.

13. An illumination device comprising:
the organic electroluminescence device according to claim 1 .

14. A display device comprising:
the organic electroluminescence device according to claim 1 .

Assignees

• Sharp Kk

Inventors

• Uchida Hideki
• Kikuchi Katsuhiro
• Isomura Yoshiyuki
• Koike Eiji
• Inoue Satoshi
• Tsukamoto Yuto
• Ohara Masanori
• Matsunaga Kazuki

Classifications

• H01L51/5209

  Electricity · mapped topic

• H01L51/5268

  Electricity · mapped topic

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H01L51/5271 Primary

  Electricity · mapped topic

• H10K59/878

  comprising reflective means · CPC title