Heterocyclic compound, organic light-emitting device including the same, and electronic apparatus including the organic light-emitting device
US-2024373662-A1 · Nov 7, 2024 · US
Organic electroluminescence element, illumination device, and display device
US9040975B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9040975-B2 |
| Application number | US-201214119533-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 11, 2012 |
| Priority date | Jun 15, 2011 |
| Publication date | May 26, 2015 |
| Grant date | May 26, 2015 |
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Abstract
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The purpose of the present invention is to provide: an organic electroluminescence element having a plurality of light-emitting dopants of different light-emitting wavelengths and emitting white light, the white-light-emitting organic electroluminescence element having excellent longevity, low-voltage driving, and chromatic stability, and also having a few dark spots; as well as an illumination device and a display device that use the element. This organic electroluminescence element contains at least one light-emitting layer sandwiched between a positive electrode and a negative electrode, the organic electroluminescence element characterized in that the light-emitting layer contribution ratio, defined as the ratio ΔPL/ΔEL of the photoluminescence intensity decay rate to the electroluminescence intensity decay rate, is 0.3 to 1.0.
First claim
Opening claim text (preview).
The invention claimed is: 1. An organic electroluminescence element comprising at least one light-emitting layer provided between an anode and a cathode, wherein a contribution ratio of the light-emitting layer is 0.3 or more and 1.0 or less, the contribution ratio (ΔPL/ΔEL) of the light-emitting layer being defined as a ratio of a decay rate of photoluminescence intensity (ΔPL) to a decay rate of electroluminescence intensity (ΔEL). 2. The organic electrolum…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9040975B2 cover?
- The purpose of the present invention is to provide: an organic electroluminescence element having a plurality of light-emitting dopants of different light-emitting wavelengths and emitting white light, the white-light-emitting organic electroluminescence element having excellent longevity, low-voltage driving, and chromatic stability, and also having a few dark spots; as well as an illumination…
- Who is the assignee on this patent?
- Tani Kunio, Katakura Rie, Inoue Satoru, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C09K11/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 26 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).