Organic electroluminescent element, organic electroluminescent display device, and electronic equipment
US-2024423010-A1 · Dec 19, 2024 · US
Light emitting device containing iridium complex
US8994017B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994017-B2 |
| Application number | US-201314101390-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 10, 2013 |
| Priority date | Nov 27, 2001 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A triplet light emitting device which has high efficiency and improved stability and which can be fabricated by a simpler process is provided by simplifying the device structure and avoiding use of an unstable material. In a multilayer device structure using no hole blocking layer conventionally used in a triplet light emitting device, that is, a device structure in which on a substrate, there are formed an anode, a hole transporting layer constituted by a hole transporting material, an electron transporting and light emitting layer constituted by an electron transporting material and a dopant capable of triplet light emission, and a cathode, which are laminated in the stated order, the combination of the hole transporting material and the electron transporting material and the combination of the electron transporting material and the dopant material are optimized.
First claim
Opening claim text (preview).
What is claimed is: 1. A light emitting device comprising an anode, an organic compound film, and a cathode, the organic compound film comprising: a first layer, a second layer and a third layer, wherein the second layer is in contact with the first layer, and the third layer is in contact with the second layer, wherein the first layer includes a hole transporting material, wherein the second layer includes an electron transporting material and a light emitting material cont…
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Cross-Sectional Technologies · mapped topic
Electricity · mapped topic
- H10K85/631Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US8994017B2 cover?
- A triplet light emitting device which has high efficiency and improved stability and which can be fabricated by a simpler process is provided by simplifying the device structure and avoiding use of an unstable material. In a multilayer device structure using no hole blocking layer conventionally used in a triplet light emitting device, that is, a device structure in which on a substrate, there …
- Who is the assignee on this patent?
- Semiconductor Energy Lab
- What technology area does this patent fall under?
- Primary CPC classification H10K85/631. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 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).