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
Organic electroluminescent element and electronic device
US9406897B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9406897-B2 |
| Application number | US-201514668439-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2015 |
| Priority date | Apr 7, 2014 |
| Publication date | Aug 2, 2016 |
| Grant date | Aug 2, 2016 |
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Abstract
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An organic electroluminescent element includes a layer having a shallower LUMO and a higher T 1 than those of the first light-emitting layer on the anode side of the first light-emitting layer, and a layer which satisfies at least one of a deeper LUMO and includes a lower T 1 than those of the second light-emitting layer on the anode side of the second light-emitting layer, and provides the organic electroluminescent element capable of suppressing the lowering of display quality.
First claim
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What is claimed is: 1. An organic electroluminescent element comprising: an anode, a cathode, a first light-emitting layer and a second light-emitting layer which are interposed between the anode and the cathode, a layer which is in contact with the first light-emitting layer on the anode side and satisfies relations of having a shallower LUMO (Lowest Unoccupied Molecular Orbital) and of having a higher minimum triplet excitation energy (T 1 ) than those of the first light-emitting layer, and a layer which is in contact with the second light-emitting layer on the anode side and satisfies at least any one of relations of having a deeper LUMO (Lowest Unoccupied Molecular Orbital) and of having a lower minimum triplet excitation energy (T1) than those of the second light-emitting layer. 2. The organic electroluminescent element according to claim 1 , wherein the layer which is in contact with the second light-emitting layer satisfies both relations of having a deeper LUMO (Lowest Unoccupied Molecular Orbital) and having a lower minimum triplet excitation energy (T 1 ) than those of the second light-emitting layer. 3. The organic electroluminescent element according to claim 1 , wherein a wavelength of the light-emitting light from the first light-emitting layer is shorter than a wavelength of the light-emitting light from the second light-emitting layer. 4. The organic electroluminescent element according to claim 1 , wherein a thickness of the second light-emitting layer is formed smaller than that of the first light-emitting layer. 5. The organic electroluminescent element according to claim 1 , wherein the first light-emitting layer is formed closer to the light extraction side of the organic electroluminescent element than the second light-emitting layer. 6. The organic electroluminescent element according to claim 1 , further comprising an intermediate connector layer between the first light-emitting layer and the second light-emitting layer. 7. The organic electroluminescent element according to claim 6 , wherein the intermediate connector layer is an electric charge-generating layer or a metal layer. 8. The organic electroluminescent element according to claim 1 , further comprising: a third light-emitting layer together with the first light-emitting layer and the second light-emitting layer, and a layer which is in contact with the third light-emitting layer on the anode side and satisfies at least one of relations of having a deeper LUMO (Lowest Unoccupied Molecular Orbital) and of having a lower minimum triplet excitation energy (T 1 ) than those of the third light-emitting layer. 9. An electronic device comprising the organic electroluminescent element according to claim 1 .
Assignees
Inventors
Classifications
Electricity · mapped topic
- H01L51/5004Primary
Electricity · mapped topic
Electricity · mapped topic
Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers · CPC title
- H10K50/11Primary
characterised by the electroluminescent [EL] layers · CPC title
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- What does patent US9406897B2 cover?
- An organic electroluminescent element includes a layer having a shallower LUMO and a higher T 1 than those of the first light-emitting layer on the anode side of the first light-emitting layer, and a layer which satisfies at least one of a deeper LUMO and includes a lower T 1 than those of the second light-emitting layer on the anode side of the second light-emitting layer, and provides the o…
- Who is the assignee on this patent?
- Konica Minolta Inc
- What technology area does this patent fall under?
- Primary CPC classification H01L51/5004. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 02 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).