Green emitting phosphors combined with broad band organic red emitters with a sharp near ir cut off
US-2015372240-A1 · Dec 24, 2015 · US
Organic electroluminescent element
US8941102B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941102-B2 |
| Application number | US-201214006421-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 organic electroluminescent element which is designed to emit white light in a range of a low color temperature to a high color temperature that is important for an illumination light source with a minor design change, and, moreover, has high color rendering property especially in an average color rendering index Ra and a special color rendering index R9 for red, while being highly efficient and long-life is obtained. The organic electroluminescent element includes: a transparent electrode; a first light-emitting unit including blue and green fluorescent light-emitting layers; an intermediate layer; a second light-emitting unit including red and green phosphorescent light-emitting layers; and a reflecting electrode. The first and second light-emitting units are stacked and the intermediate layer is interposed therebetween. The first light-emitting unit is designed to emit light by use of a phenomenon that a singlet exciton is generated by collision and fusion of two triplet excitons.
First claim
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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 and a green fluorescent light-emitting layer; an intermediate layer; a second light-emitting unit including a red phosphorescent light-emitting layer and a green phosphorescent light-emitting layer; and a reflecting electrode, wherein: the first light-emitting unit and the second light-emit…
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Classifications
- H01L51/5036Primary
Electricity · mapped topic
Electricity · mapped topic
- H10K50/131Primary
Electricity · mapped topic
- H10K50/125Primary
Electricity · mapped topic
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- What does patent US8941102B2 cover?
- The organic electroluminescent element which is designed to emit white light in a range of a low color temperature to a high color temperature that is important for an illumination light source with a minor design change, and, moreover, has high color rendering property especially in an average color rendering index Ra and a special color rendering index R9 for red, while being highly efficient…
- Who is the assignee on this patent?
- Tsuji Hiroya, Watanabe Kenichiro, Ide Nobuhiro, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H01L51/5036. 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).