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US 11,718,789 B2Granted
Quantum dots and device including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSeon-Yeong Kim, Yong Wook Kim, Soo Kyung Kwon, Ji-Yeong Kim, Sungwoo Hwang
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Abstract
A cadmium free quantum dot or a population thereof or a device including the same, wherein the cadmium free quantum dot includes a core (or a semiconductor nanocrystal particle) including a first semiconductor including a Group IIB-VI compound and a shell (or a coating) disposed on the core (or the semiconductor nanocrystal particle) including a Group IIB-V compound and exhibits a quantum efficiency of about 60% or higher.
Claims20
A quantum dot comprising:
- a core comprising a first semiconductor nanocrystal;
- and
- a semiconductor nanocrystal shell disposed on the core,
- wherein
- the first semiconductor nanocrystal comprises a Group IIB-VI compound and the semiconductor nanocrystal shell comprises a Group IIB-V compound,
- the quantum dot does not comprise cadmium, and
- a quantum efficiency of the quantum dot is greater than or equal to about 60%.
4 more elements
A quantum dot comprising
- a semiconductor nanocrystal particle comprising a Group IIB-VI compound;
- and
- a coating disposed on the semiconductor nanocrystal particle,
- wherein
- the quantum dot does not comprise cadmium,
- the coating comprises a material having a crystallinity lower than the semiconductor nanocrystal particle, as determined by a transmission electron microscope, the material comprising a Group IIB-V compound,
- the quantum dot is configured to emit light after excitation by an excitation light,
- a wavelength of the light to be emitted by the quantum dot is shorter than a wavelength of the excitation light.
5 more elements
Dependencies are inferred from the claim text.