Light-emitting element, lighting device, light-emitting device, and electronic device
US-9653697-B2 · May 16, 2017 · US
Light-Emitting Element, Lighting Device, Light-Emitting Device, and Electronic Device
US2017317306A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017317306-A1 |
| Application number | US-201715594976-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 15, 2017 |
| Priority date | May 17, 2013 |
| Publication date | Nov 2, 2017 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A light-emitting element includes a first electrode; a first light-emitting layer over the first electrode, containing a first phosphorescent compound and a first host material; a second light-emitting layer over the first light-emitting layer, containing a second phosphorescent compound and a second host material; a third light-emitting layer over the second light-emitting layer, containing a third phosphorescent compound and a third host material; and a second electrode over the third light-emitting layer. Between peaks of emission spectra of the first, second, and third phosphorescent compounds, the peak of the emission spectrum of the second phosphorescent compound is on the longest wavelength side and that of the emission spectrum of the third phosphorescent compound is on the shortest wavelength side. The third host material has higher triplet excitation energy than the first host material and the second host material.
First claim
Opening claim text (preview).
What is claimed is: 1 . A light-emitting element comprising: a first electrode; a first light-emitting layer over the first electrode, the first light-emitting layer comprising a first phosphorescent compound and a first host material; a second light-emitting layer over the first light-emitting layer, the second light-emitting layer comprising a second phosphorescent compound and a second host material; a third light-emitting layer over the second light-emitting layer, the third light-emitting layer comprising a third phosphorescent compound and a third host material; and a second electrode over the third light-emitting layer, wherein between a peak of an emission spectrum of the first phosphorescent compound, a peak of an emission spectrum of the second phosphorescent compound, and a peak of an emission spectrum of the third phosphorescent compound, the peak of the emission spectrum of the second phosphorescent compound is on a longest wavelength side and the peak of the emission spectrum of the third phosphorescent compound is on a shortest wavelength side, and wherein the third host material has higher triplet excitation energy than the first host material and the second host material.
Assignees
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Classifications
Iridium compounds · CPC title
containing three nitrogen atoms as heteroatoms · CPC title
of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd · CPC title
- C09K11/06Primary
containing organic luminescent materials · CPC title
Non-condensed systems · CPC title
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- What does patent US2017317306A1 cover?
- A light-emitting element includes a first electrode; a first light-emitting layer over the first electrode, containing a first phosphorescent compound and a first host material; a second light-emitting layer over the first light-emitting layer, containing a second phosphorescent compound and a second host material; a third light-emitting layer over the second light-emitting layer, containing a …
- Who is the assignee on this patent?
- Semiconductor Energy Lab
- 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 Thu Nov 02 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).