Organic light emitting diode, organic light emitting display panel including the organic light emitting diode and method of manufacturing the organic light emitting display panel
US-9224970-B2 · Dec 29, 2015 · US
Light-emitting element, light-emitting device, display device, electronic device, and lighting device
US8994013B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994013-B2 |
| Application number | US-201313892667-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 13, 2013 |
| Priority date | May 18, 2012 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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An object is to provide a light-emitting element which includes an exciplex being used as an energy donor capable of efficiently transferring energy to a substance exhibiting thermally activated delayed fluorescence. The exciplex comprises two kinds of substances and its singlet and triplet excited states are close to each other. Thus, by making light emission of the exciplex overlap with an absorption band on the longest wavelength side which corresponds to absorption by the substance exhibiting thermally activated delayed fluorescence, i.e., an energy acceptor, in a singlet excited state, it becomes possible to achieve efficient energy transfer from a singlet excited state of the exciplex to a singlet excited state of the substance exhibiting thermally activated delayed fluorescence, and it also becomes possible to achieve efficient energy transfer from a triplet excited state of the exciplex to a triplet excited state of the substance exhibiting thermally activated delayed fluorescence.
First claim
Opening claim text (preview).
What is claimed is: 1. A light-emitting device comprising: a pair of electrodes; and a light-emitting layer between the pair of electrodes, the light-emitting layer comprising a first organic compound, a second organic compound, and a light-emitting substance which exhibits thermally activated delayed fluorescence, wherein an emission of an exciplex of the first organic compound and the second organic compound overlaps with an absorption band of the light-emitting substance.…
Assignees
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- H01L51/5072Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8994013B2 cover?
- An object is to provide a light-emitting element which includes an exciplex being used as an energy donor capable of efficiently transferring energy to a substance exhibiting thermally activated delayed fluorescence. The exciplex comprises two kinds of substances and its singlet and triplet excited states are close to each other. Thus, by making light emission of the exciplex overlap with an ab…
- Who is the assignee on this patent?
- Semiconductor Energy Lab
- What technology area does this patent fall under?
- Primary CPC classification H01L51/5072. 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).