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Nanocrystalline composite material, its preparation method and its application

A technology of composite materials and nanocrystals, applied in the direction of luminescent materials, nanotechnology, nano-optics, etc., can solve the problems of 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: 2022-07-29
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, its preparation method and its application
  • Nanocrystalline composite material, its preparation method and its application
  • Nanocrystalline composite material, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0071] (3) Prepare a PVA (polymerization degree of 17,000, molecular weight of about 75,000, and alcoholysis degree greater than 98%) polymer aqueous solution; add the solution obtained in step (2) into the polymer aqueous solution, and stir at 3000 rpm and 3min. The mixture of microstructures is used as a dispersion; the above-mentioned dispersion is cured and packaged on an LED chip to obtain an LED package structure.

[007...

Embodiment 2

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

Embodiment 3

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

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Abstract

The present application discloses a nanocrystalline composite material, its preparation method and its application. The nanocrystal composite material includes semiconductor nanocrystals and ligands supported on the surface of the semiconductor nanocrystals, and the ligands include a complex formed by a chelating agent and a metal silicate. The nanocrystalline composite material of the present application has excellent resistance to high light intensity, that is, under the same strong light irradiation, the degree of decrease in the fluorescence quantum yield of the nanocrystalline composite material of the present application is smaller than that of the nanocrystalline material of the prior art; in addition, The preparation cost of the nanocrystalline composite material of the present application is relatively low, and the preparation method is simple.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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