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Nanocrystalline composite material, and preparation method and application thereof

A technology of composite materials and nanocrystals, which is applied in the field of its preparation and nanocrystal composite materials, can solve problems such as high cost and complicated preparation process, and achieve the effects of low preparation cost, simple preparation method, and excellent anti-high light intensity performance

Active Publication Date: 2021-07-02
NANJING TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the aforementioned method of improving the anti-light ability of nanocrystals has obvious effects, the cost is high and the preparation process is complicated.

Method used

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  • Nanocrystalline composite material, and preparation method and application thereof
  • Nanocrystalline composite material, and preparation method and application thereof
  • Nanocrystalline composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1) Mix 1mL trioctylphosphine (TOP) with 0.1mol magnesium silicate to prepare a magnesium silicate-TOP solution with a concentration of 0.1mmol / mL, wherein the amount of TOP is equal to the amount of magnesium silicate The ratio is 22:1.

[0070] (2) Provide CdZnSeS / ZnS nanocrystals with absorbance OD=100 at 450nm, dissolve it in 0.5mL octadecene (ODE) solution, and then mix with 0.5mL magnesium silicate-TOP solution of step (1) Mix and react to prepare nanocrystalline composite material.

[0071] (3) prepare PVA (the degree of polymerization is 17000, the molecular weight is about 75000, the degree of alcoholysis is greater than 98%) polymer aqueous solution; The solution that step (2) makes is added in the polymer aqueous solution, forms under 3000rpm, 3min stirring conditions The mixture of microstructures is used as a dispersion; the above dispersion is cured and packaged on an LED chip to obtain an LED packaging structure.

[0072] Test the time required for the ...

Embodiment 2

[0074] The difference between embodiment 2 and embodiment 1 is that in step (1): 1mL oleylamine is mixed with 0.1mol magnesium silicate to prepare a magnesium silicate-oleylamine solution with a concentration of 0.1mmol / mL, wherein the content of oleylamine The ratio of amount to amount of substance of magnesium silicate is 30:1.

Embodiment 3

[0076] The difference between embodiment 3 and embodiment 1 is that magnesium silicate is replaced by aluminum silicate.

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Abstract

The invention discloses a nanocrystalline composite material as well as a preparation method and application thereof. The nanocrystalline composite material comprises a semiconductor nanocrystalline and a ligand loaded on the surface of the semiconductor nanocrystalline, and the ligand comprises a complex formed by a chelating agent and metal silicate. The nanocrystalline composite material disclosed by the invention has excellent high light intensity resistance, that is, under the same strong light irradiation, the reduction degree of the fluorescence quantum yield of the nanocrystalline composite material disclosed by the invention is smaller than that of a nanocrystalline material in the prior art; in addition, the preparation cost of the nanocrystalline composite material is low, and the preparation method is simple.

Description

technical field [0001] The application relates to the technical field of semiconductor materials, in particular to nanocrystalline composite materials, their preparation methods and applications. Background technique [0002] Semiconductor nanocrystals are a new type of luminescent material, which are widely used in optoelectronic devices. In the past two decades, the research on nanocrystal synthesis chemistry has mainly focused on the monodisperse control of size and morphology and how to improve the fluorescence quantum yield. An important goal is to minimize the influence of the environment (especially light, water, and oxygen) on the optoelectronic performance of nanocrystals. [0003] The effects of water and oxygen on the optical and electrical properties of nanocrystals are often associated with light, including photohydrolysis and photooxidation processes. At present, the main application of nanocrystals is in display, including nanocrystal film, nanocrystal packa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/88B82Y20/00B82Y30/00H01L33/50G09F9/33
CPCC09K11/025C09K11/883B82Y20/00B82Y30/00H01L33/502G09F9/33
Inventor 周健海贾轩睿
Owner NANJING TECH CORP LTD