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US-2024381702-A1 · Nov 14, 2024 · US
Organic electroluminescent element
US8941103B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941103-B2 |
| Application number | US-201214006442-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 12, 2012 |
| Priority date | Mar 24, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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The present invention proposes a white organic electroluminescent element which is a multiunit element capable of emitting high intensity light that is important to a light source for lighting use, and can have an extended lifetime while suppressing deterioration in luminance. The organic electroluminescent element includes: a transparent electrode; and a first light-emitting unit including a blue fluorescent light-emitting layer containing a blue fluorescent light-emitting material; an intermediate layer; and a second light-emitting unit including a red phosphorescent light-emitting layer containing a red phosphorescent light-emitting material and a green phosphorescent light-emitting layer containing a green phosphorescent light-emitting material; and a reflecting electrode, wherein: the first and second light-emitting units are stacked having the intermediate layer interposed therebetween; and a film thickness (tR) of the red phosphorescent light-emitting layer and a film thickness (tG) of the green phosphorescent light-emitting layer satisfy a relation of 5*tR≦tG.
First claim
Opening claim text (preview).
The invention claimed is: 1. An organic electroluminescent element, comprising: a transparent electrode; a first light-emitting unit including a blue fluorescent light-emitting layer containing a blue fluorescent light-emitting material; an intermediate layer; a second light-emitting unit including a red phosphorescent light-emitting layer containing a red phosphorescent light-emitting material and a green phosphorescent light-emitting layer containing a green phosphorescent…
Assignees
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H10K59/32Primary
Electricity · mapped topic
Electricity · mapped topic
- H01L51/5203Primary
Electricity · mapped topic
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- What does patent US8941103B2 cover?
- The present invention proposes a white organic electroluminescent element which is a multiunit element capable of emitting high intensity light that is important to a light source for lighting use, and can have an extended lifetime while suppressing deterioration in luminance. The organic electroluminescent element includes: a transparent electrode; and a first light-emitting unit including a b…
- Who is the assignee on this patent?
- Tsuji Hiroya, Kittichungchit Varutt, Ide Nobuhiro, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H10K59/32. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 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).