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Organic light emitting element having emission layers and an electron injection layer including fullerene and lithium quinolate
US9293736B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9293736-B2 |
| Application number | US-201113292912-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 9, 2011 |
| Priority date | Jun 27, 2011 |
| Publication date | Mar 22, 2016 |
| Grant date | Mar 22, 2016 |
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Abstract
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An organic light emitting element includes a first electrode, a second electrode, and an organic layer. The organic layer includes a first emission layer between the first electrode and the second electrode, a second emission layer between the first emission layer and the second electrode, and an electron injection layer (EIL) between the first emission layer and the second emission layer, the electron injection layer (EIL) containing fullerene (C60).
First claim
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What is claimed is: 1. An organic light emitting element comprising: a first electrode, a second electrode, and an organic layer therebetween, wherein the organic layer comprises: a first emission layer between the first electrode and the second electrode; a second emission layer between the first emission layer and the second electrode; and an electron injection layer (EIL) between the first emission layer and the second emission layer, and comprising fullerene (C60) and lithium quinolate (LiQ). 2. The organic light emitting element of claim 1 , wherein the organic light emitting element has a tandem structure comprising a first unit device and a second unit device stacked on the first unit device, the first unit device comprising the first electrode, the first emission layer, and the electron injection layer (EIL), and the second unit device comprising the second emission layer and the second electrode, and wherein a charge generation layer is not included. 3. The organic light emitting element of claim 1 , wherein the electron injection layer (EIL) comprises a lithium quinolate (LiQ)-containing first electron injection layer (EIL) and a fullerene (C60)-containing second electron injection layer (EIL). 4. The organic light emitting element of claim 1 , further comprising an electron transport layer (ETL) between the first emission layer and the electron injection layer (EIL). 5. The organic light emitting element of claim 1 , wherein the first emission layer is a red or green emission layer, and the second emission layer is a blue emission layer. 6. The organic light emitting element of claim 1 , wherein the organic layer has a thickness between 160 nm and 300 nm. 7. The organic light emitting element of claim 1 , wherein the first electrode is an anode, and the second electrode is a cathode. 8. The organic light emitting element of claim 1 , wherein the organic light emitting element has a tandem structure comprising a first unit device, and a second unit device stacked on the first unit device, the first unit device comprising the first electrode, the first emission layer, and the electron injection layer (EIL), the second unit device comprising the second emission layer and the second electrode, and wherein the first unit device or the second unit device comprises a hole transport layer (HTL) doped with a P-type material. 9. The organic light emitting element of claim 1 , wherein the organic layer further comprises at least one layer selected from the group consisting of a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer, an emission layer, a hole blocking layer, an electron transport layer (ETL), and an electron injection layer (EIL).
Assignees
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Classifications
- B82Y20/00Primary
Nanooptics, e.g. quantum optics or photonic crystals · CPC title
- H01L51/5278Primary
Electricity · mapped topic
- H10K85/20Primary
Carbon compounds, e.g. carbon nanotubes or fullerenes · CPC title
- H10K50/19Primary
Tandem OLEDs · CPC title
Electron injection layers · CPC title
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- What does patent US9293736B2 cover?
- An organic light emitting element includes a first electrode, a second electrode, and an organic layer. The organic layer includes a first emission layer between the first electrode and the second electrode, a second emission layer between the first emission layer and the second electrode, and an electron injection layer (EIL) between the first emission layer and the second emission layer, the …
- Who is the assignee on this patent?
- Ko Hee-Joo, Cho Se-Jin, Lee Bo-Ra, and 8 more
- What technology area does this patent fall under?
- Primary CPC classification B82Y20/00. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 22 2016 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).