Light emitting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorSatoshi Seo
Life of this patent
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Abstract
A drying agent enclosed in an organic EL element is sealed with a shape with which particulate contamination becomes less than that of a conventional shape, while still capable of showing a moisture absorption capacity similar to that of a fine powder. A light emitting device, and an electronic device, having long life and having less particulate contamination than in a device manufactured by conventional processes, are provided by using the organic EL element. The drying agent, made from a compound capable of chemically absorbing moisture, is formed as a bulk porous body or a porous film, and is formed along with the organic EL elements within a container cut off from the atmosphere. In addition, the light emitting device and the electronic device are manufactured using the organic EL elements.
Claims68
A light emitting device comprising:
- a container cut off from the atmosphere;
- an organic electroluminescence element in the container;
- and
- a drying agent in the container,
- wherein the drying agent chemically absorbs moisture, and maintains a solid state after the moisture absorption, and
- wherein the drying agent comprises a porous body having a porosity of 20% or more.
A light emitting device comprising:
- a container cut off from the atmosphere;
- an organic electroluminescence element in the container;
- and
- a drying agent in the container,
- wherein the drying agent chemically absorbs moisture, and maintains a solid state after the moisture absorption, and
- wherein the drying agent comprises a porous film having a porosity of 20% or more.
A light emitting device comprising:
- a container cut off from the atmosphere;
- an organic electroluminescence element in the container;
- and
- a drying agent in the container, wherein the drying agent comprises at least one selected from the group consisting of an alkaline metal oxide and an alkaline-earth metal oxide, and wherein the drying agent is formed as a porous film having a porosity of 20% or more.
A light emitting device comprising:
- a container cut off from the atmosphere;
- an organic electroluminescence element in the container;
- and
- a drying agent in the container,
- wherein the drying agent comprises at least one selected from the group consisting of an alkaline metal oxide and an alkaline-earth metal oxide, and
- wherein the drying agent is formed as a porous film having a porosity of 20% or more by a sol-gel method.
A light emitting device comprising:
- an organic electroluminescence element over a first substrate;
- a second substrate opposed to the first substrate, wherein a drying agent comprising a porous body is provided in contact with the second substrate;
- and
- a sealing member interposed between the first substrate and the second substrate, wherein the drying agent chemically absorbs moisture, and maintains a solid state after the moisture absorption.
A light emitting device comprising:
- an organic electroluminescence element over a first substrate;
- a second substrate opposed to the first substrate, wherein a drying agent comprising a porous film is provided in contact with the second substrate;
- and
- a sealing member interposed between the first substrate and the second substrate,
- wherein the drying agent chemically absorbs moisture, and maintains a solid state after the moisture absorption.
Dependencies are inferred from the claim text.