Quantum dot and preparation method thereof
A technology of quantum dots and solutions, applied in the field of quantum dots and their preparation, can solve problems such as high toxicity, environmental pollution, and narrowing of application scope
Inactive Publication Date: 2019-07-05
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology
Traditional perovskite quantum dots often use heavy metals such as Pb and Cd in the synthesis method, resulting in high toxicity, which limits its popularization and application, thereby reducing its application range, and also pollutes the environment.
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[0021] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be practiced. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are for reference only The orientation of the attached schema. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention. In the figures, structurally similar units are denoted by the same reference numerals.
[0022] The present invention provides a kind of preparation method of quantum dot, it comprises the following steps:
[0023] S101, mixing the lead halide solution, the coordination solvent and the non-polar organic solution to obtain the first solution;
[0024] Such as figure 1 shown, for example, the PbX 2 Solution, oleic acid, oleylamine and non-polar organic ...
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The invention provides a quantum dot and a preparation method thereof. The preparation method comprises following steps: mixing a lead halide solution, a ligand solvent, and a non-polar organic solution to obtain a first solution; mixing a tin halide solution, the ligand solvent, and the non-polar organic solution to obtain a second solution; mixing cesium carbonate, oleic acid, and an octadecenesolution to obtain a cesium oleate solution; mixing the first solution with the cesium oleate solution to carry out reactions to obtain a reaction liquid; subjecting the reaction liquid to centrifugalseparation to obtain intermediate quantum dots; dispersing the intermediate quantum dots in the non-polar organic solution, adding the second solution, and carrying out reactions to obtain the targetquantum dots. The provided quantum dot and preparation method have the advantages that the application range of perovskite quantum dots is enlarged, and environmental pollution is avoided.
Description
[0001] 【Technical field】 [0002] The invention relates to the field of display technology, in particular to a quantum dot and a preparation method thereof. [0003] 【Background technique】 [0004] Quantum dots are widely used due to their good thermal stability, high quantum efficiency, and high color gamut. Quantum dot materials have a quantum size effect. By changing the size and shape of the particles, the fluorescence spectrum of the system can be adjusted, and finally the entire visible light region can be adjusted, and even the coverage of the ultraviolet and near-infrared regions can be realized. [0005] Taking perovskite quantum dots as an example, they are widely used in solar cells and lasers due to their excellent electrical properties such as fast electron transfer rate, large exciton binding energy, long diffusion distance, etc. , Light-emitting diode (LED), flat panel display and other fields. The traditional perovskite quantum dots often use heavy metals such...
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IPC IPC(8): C09K11/66B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/665
Inventor 陈旭
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD