Photosensitive resin composition, cured product, fluorine-containing resin cured film, and display
US-2024134276-A1 · Apr 25, 2024 · US
Light-emitting element, light-emitting device and electronic device
US9192017B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9192017-B2 |
| Application number | US-40499109-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 16, 2009 |
| Priority date | Mar 18, 2008 |
| Publication date | Nov 17, 2015 |
| Grant date | Nov 17, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A light-emitting element with improved emission efficiency is provided. The light-emitting element includes a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked in contact with each other over an anode, and a first substance serving as an emission center substance in the second light-emitting layer is the same as a main substance in the first light-emitting layer. Note that a second substance is added to the first light-emitting layer for stabilization of film quality, and a third substance serving as a host material to disperse the first substance serving as an emission center substance is included in the second light-emitting layer. In the light-emitting element, the second substance and the third substance are substances having energy gaps (or triplet energy) larger than the first substance.
First claim
Opening claim text (preview).
What is claimed is: 1. A light-emitting element comprising: an anode; a hole-transporting layer over the anode; a first light-emitting layer over and in direct contact with the hole-transporting layer, the first light-emitting layer comprising a first substance and a second substance; a second light-emitting layer over and in direct contact with the first light-emitting layer, the second light-emitting layer comprising the first substance and a third substance; and a catho…
Assignees
Inventors
Classifications
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- H05B33/14Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9192017B2 cover?
- A light-emitting element with improved emission efficiency is provided. The light-emitting element includes a light-emitting layer in which a first light-emitting layer and a second light-emitting layer are stacked in contact with each other over an anode, and a first substance serving as an emission center substance in the second light-emitting layer is the same as a main substance in the firs…
- Who is the assignee on this patent?
- Ohsawa Nobuharu, Semiconductor Energy Lab
- What technology area does this patent fall under?
- Primary CPC classification H05B33/14. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).