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
Phosphorescent organic light emitting devices combined with hole transport material having high operating stability
US9705092B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9705092-B2 |
| Application number | US-201114237142-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 5, 2011 |
| Priority date | Aug 5, 2011 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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Abstract
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An improved OLED includes an emitter layer disposed between a cathode and an anode where the emitter layer includes a host material and a phosphorescent emitter material. A first hole transport layer is disposed between the emitter layer and the anode and a second hole transport layer is disposed between the first hole transport layer and the anode. The first hole transport layer includes a first hole transport material that is a carbazole type compound and the second hole transport layer includes a second hole transport material that is different from the first hole transport material. The phosphorescent emitter material includes a phosphorescent organometallic compound that is a heteroleptic compound represented by the formula L 2 MX, LL′MX, LL′L″M, or LMXX′, wherein L, L′, L″, X, and X′ are inequivalent, bidentate ligands and M is a metal that forms octahedral complexes, wherein L, L′, and L″ are monoanionic inequivalent bidentate ligands coordinated to M through an sp 2 hybridized carbon and a heteroatom.
First claim
Opening claim text (preview).
What is claimed is: 1. An organic light emitting device comprising an anode, a cathode and a plurality of organic layers sandwiched between them, the plurality of organic layers comprising: an emitter layer comprising a host material and a phosphorescent emitter material, the phosphorescent emitter material comprising a phosphorescent organometallic compound that emits phosphorescent radiation from a triplet molecular excited state when a voltage is applied across the first organi…
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Electricity · mapped topic
- C09K11/06Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9705092B2 cover?
- An improved OLED includes an emitter layer disposed between a cathode and an anode where the emitter layer includes a host material and a phosphorescent emitter material. A first hole transport layer is disposed between the emitter layer and the anode and a second hole transport layer is disposed between the first hole transport layer and the anode. The first hole transport layer includes a fir…
- Who is the assignee on this patent?
- Yamamoto Hitoshi, Weaver Michael Stewart, Yokoyama Norimasa, and 4 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 Jul 11 2017 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).