Hydrotalcite coated quantum dot microspheres and preparation method thereof

Abstract

The invention provides hydrotalcite coated quantum dot microspheres which comprise quantum dot microspheres and hydrotalcite coatings arranged on the quantum dot microspheres. The quantum dot microspheres are formed by compounding quantum dots and a primary substrate material. The invention also provides a preparation method of the hydrotalcite coated quantum dot microspheres. The quantum microspheres which are good in light emitting efficiency and stability are obtained by coating the hydrotalcite material to the surfaces of the quantum dot microspheres. By using the inorganic material hydrotalcite as a blocking material, the quantum dot microspheres are protected effectively by means of the excellent waterproof and oxygen-proof ability. Oxygen and water vapor are isolated to a certain extent, and meanwhile, the stability of the quantum dot microspheres in a medium material is further improved by means of alkaline property of the hydrotalcite.

Description

[0001] divisional application [0002] This application is a divisional application of the Chinese patent application "201710091507.6" entitled "Hydrotalcite-coated quantum dot microspheres and preparation method thereof" filed on February 22, 2017. technical field [0003] The invention relates to the technical field of semiconductor nanomaterial preparation, in particular to a hydrotalcite-coated quantum dot microsphere and a preparation method thereof. Background technique [0004] Compared with traditional organic fluorescent dyes, quantum dots have a high yield, are not easy to photolyze, have a narrow half-peak width, and can emit monochromatic light with higher purity. At present, they have gradually become a new type of photoconversion material. For example, in the field of liquid crystal display, display manufacturers have obtained light with purer color, higher saturation and higher luminous efficiency by adding photoluminescent quantum dot film to the backlight m...

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Problems solved by technology

[0005] However, quantum dots are sensitive to water and oxygen

Quantum dots are prone to oxidation and damage when exposed to air and moisture, resulting in loss of luminescent properties

In fact, the use environment of quantum dots is often high temperature, high-intensity light, ambient gas and moisture. These adverse effects further lead to the decline and loss of quantum dot efficiency, which limits the scope of use of luminescent quantum dots.

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