Core-shell quantum dot and preparation method therefor and quantum dot electroluminescent device
AssigneeGuangdong Juhua Research Institute of Advanced Display
InventorTianfeng WANG
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Abstract
A core-shell quantum dot and a preparation method therefor, and a quantum-dot electroluminescent device. The core-shell quantum dot includes a seed crystal, a core layer covering a surface of the seed crystal, and a shell layer covering the core layer. Compared with a core-shell quantum dot in the prior art, a seed crystal is introduced in the structure of a core-shell quantum dot, a core layer is first grown on the seed crystal, and then a shell layer covering the core layer is formed, such that the nucleation uniformity of the core layer is improved, and the luminous efficiency of the quantum dot is improved.
Claims20
A core-shell quantum dot, comprising:
- a seed crystal;
- a core layer covering the seed crystal, serving as a quantum dot core;
- and
- a shell layer covering the quantum dot core.
A method for preparing a core-shell quantum dot, comprising:
- providing a seed crystal;
- dispersing the seed crystal in a core reaction system comprising a first cation precursor;
- adding an anion precursor to grow a quantum dot core under an inert gas environment at a first preset temperature;
- adding a shell precursor for a ripening treatment to obtain a core-shell quantum dot mixed solution;
- and
- performing precipitation treatment on the core-shell quantum dot mixed solution to obtain the core-shell quantum dot;
- wherein the seed crystal comprises one or more of a carbon quantum dot, a silicon quantum dot, and a carbon-silicon quantum dot.
A quantum dot electroluminescent device, comprising an anode, a cathode, and a quantum dot light-emitting layer between the anode and the cathode, wherein a material of the quantum dot light-emitting layer comprises the core-shell quantum dot comprising:
- a seed crystal;
- a core layer covering the seed crystal, serving as a quantum dot core;
- and
- a shell layer covering the quantum dot core.
Dependencies are inferred from the claim text.