Emissive material, light-emitting diode, and display apparatus
US-2025098522-A1 · Mar 20, 2025 · US
Display device
US12532598B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12532598-B2 |
| Application number | US-202218086643-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 22, 2022 |
| Priority date | Dec 28, 2021 |
| Publication date | Jan 20, 2026 |
| Grant date | Jan 20, 2026 |
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- Title
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Abstract
Official abstract text for this publication.
According to one embodiment, a display device includes an anode, an organic EL element layer including a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer, and a cathode, wherein ΔE 2 _LUMO is defined as a potential barrier between the electron transport layer and the hole blocking layer, and the light-emitting layer, ΔE 2 _HOMO is defined as a potential barrier between the hole transport layer and the electron blocking layer, and the light-emitting layer, and each of ΔE 2 _LUMO and ΔE 2 _HOMO is 0.1 eV or higher and 0.5 eV or less.
First claim
Opening claim text (preview).
What is claimed is: 1 . A display device comprising: an anode; an organic EL element layer including a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer; and a cathode, wherein ΔE 2 _LUMO is defined as a potential barrier between the light-emitting layer and a first mixed layer of the electron transport layer and the hole blocking layer, ΔE 2 _HOMO is defined as a potential barrier between the light-emitting layer and a second mixed layer of the hole transport layer and the electron blocking layer, each of the ΔE 2 _LUMO and the ΔE 2 _HOMO is 0.1 eV or higher and 0.5 eV or less, ΔE 1 _LUMO is defined as a potential barrier between the electron injection layer and the first mixed layer of the electron transport layer and the hole blocking layer, ΔE 1 _HOMO is defined as a potential barrier between the hole injection layer and the second mixed layer of the hole transport layer and the electron blocking layer, and each of the ΔE 1 _LUMO and the ΔE 1 _HOMO is 0.5 eV or less (ΔE 1 <0.5 eV). 2 . The display device according to claim 1 , wherein each of the ΔE 1 _LUMO and the ΔE 1 _HOMO is 0.35 eV or less. 3 . The display device according to claim 2 , wherein the ΔE 1 _LUMO is 0.2 eV or less. 4 . The display device according to claim 1 , wherein a thickness of the light-emitting layer is 30 nm or more and 40 nm or less. 5 . The display device according to claim 1 , wherein a thickness of the light-emitting layer is 20 nm or more and 30 nm or less. 6 . The display device according to claim 1 , wherein the light-emitting layer is formed by co-evaporation.
Assignees
Inventors
Classifications
Thickness · CPC title
Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values · CPC title
Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers · CPC title
Electron blocking layers · CPC title
Hole transporting layers · CPC title
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Frequently asked questions
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- What does patent US12532598B2 cover?
- According to one embodiment, a display device includes an anode, an organic EL element layer including a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer and an electron injection layer, and a cathode, wherein ΔE 2 _LUMO is defined as a potential barrier between the electron transport layer and t…
- Who is the assignee on this patent?
- Magnolia White Corp
- What technology area does this patent fall under?
- Primary CPC classification H10K50/11. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 20 2026 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).