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US 10,651,339 B2Granted
Light emitting element and display device including the same
AssigneeSamsung Display Co., Ltd.
InventorDong Chan Kim
Life of this patent
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Abstract
A light emitting element includes a first electrode, a second electrode overlapping the first electrode, and an emission layer between the first electrode and the second electrode, the emission layer including quantum dots. The quantum dots include a core and a shell. Each of the core and the shell includes at least two selected from Mg, Zn, Te, Se, and S. When the quantum dots include Mg, a content of Mg in the shell is greater than a content of Mg in the core.
Claims12
A light emitting element, comprising:
- a first electrode;
- a second electrode overlapping the first electrode;
- an emission layer between the first electrode and the second electrode, the emission layer including quantum dots,
- a hole transport layer between the first electrode and the emission layer,
- wherein the quantum dots include a core and a shell,
- the core includes at least two selected from Zn, Te, Se, and S,
- the shell includes Mg and Te,
- a lowest unoccupied molecular orbital (LUMO) energy level of the shell is greater than a LUMO energy level of the core,
- a highest occupied molecular orbital (HOMO) energy level of the shell is less than a HOMO energy level of the core, and
- a HOMO energy level of the hole transport layer is similar to the HOMO energy level of the core.
7 more elements
A light emitting element, comprising:
- a first electrode;
- a second electrode overlapping the first electrode;
- an emission layer between the first electrode and the second electrode, the emission layer including quantum dots, and
- a hole transport layer between the first electrode and the emission layer,
- wherein the quantum dots include:
- a core including Zn and Te, and
- a shell including Mg and Te, and
- a lowest unoccupied molecular orbital (LUMO) energy level of the shell is greater than a LUMO energy level of the core,
- a highest occupied molecular orbital (HOMO) energy level of the shell is less than a HOMO energy level of the core, and
- a HOMO energy level of the hole transport layer is similar to the HOMO energy level of the core.
7 more elements
A display device, comprising:
- a substrate;
- a thin film transistor on the substrate;
- a first electrode connected with the thin film transistor;
- an emission layer on the first electrode, the emission layer including quantum dots;
- a hole transport layer between the first electrode and the emission layer, and
- a second electrode on the emission layer,
- wherein the quantum dots include a core and a shell,
- the core includes at least two selected from Zn, Te, Se, and S, and
- the shell includes Mg and Te,
- a lowest unoccupied molecular orbital (LUMO) energy level of the shell is greater than a LUMO energy level of the core,
- a highest occupied molecular orbital (HOMO) energy level of the shell is less than a HOMO energy level of the core, and
- a HOMO energy level of the hole transport layer is substantially the same as or similar to the HOMO energy level of the core.
9 more elements
Dependencies are inferred from the claim text.