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A method for sealing quantum dots, quantum dot composite particles and applications

A technology of quantum dots and complexes, applied in chemical instruments and methods, instruments, luminescent materials, etc., can solve the problems of short service life and low efficiency of quantum dots, and achieve widening range, good air and moisture penetration barrier effect, The effect of preventing stress damage

Active Publication Date: 2018-10-26
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a method for sealing quantum dots, quantum dot composite particles and applications, aiming to solve the problems of low efficiency and short service life of quantum dots in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (1) Preparation of CdTe / CdS quantum dots / epoxy resin microspheres:

[0074] CdTe / CdS quantum dots / bisphenol A epoxy resin (E51) microspheres with an average particle size of 100 nm and an emission wavelength of 550 nm were prepared by inverse emulsion polymerization.

[0075] (2) Preparation of barrier layer:

[0076] Use ALD to lay out the non-conductive layer nitride layer, using SiH 2 Cl 2 and remote plasma enhanced NH 3 A silicon nitride layer is arranged. This can be done at low temperatures and does not require the use of reactive oxygen species.

Embodiment 2

[0078] (1) Preparation of CdSe / CdS quantum dots / epoxy resin particles:

[0079] Disperse red and green quantum dots CdSe / CdS with luminous wavelengths of 650nm and 550nm respectively in hydrogenated bisphenol A type epoxy resin diluted with butyl glycidyl ether (red and green quantum dots account for hydrogenated bisphenol A The mass proportion of type epoxy resin is 1% and 5%), and further dispersed and mixed uniformly by mechanical shearing; solidified to obtain quantum dot / epoxy resin block material; and then mechanically ground to obtain a 3-5um surface containing double CdSe / CdS quantum dots / epoxy resin particles with bonding groups.

[0080] (2) Preparation of barrier layer:

[0081] The multilayer film was deposited by PECVD at 55°C, and its precursor was organosiloxane, and SiOxCy flexible organosilicon cross-connected body (3 , O 2 Prepared under atmosphere, the composition is SiOxNy (100-500GPa).

[0082] In summary, the present invention seals the quantum dots by...

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Abstract

The invention discloses a quantum dot sealing method, a quantum dot compound particle and applications. According to the method, quantum dots are made into quantum dot compound particles, then a blocking layer is arranged on the surface of each quantum dot compound particle so as to seal the quantum dots; after sealing, the interaction among quantum dots is reduced, thus the possibility of agglomeration is reduced; moreover, the air and water are obstructed; at the same time, the possibility that quantum dots are disturbed and destroyed by contacting the external environment, when the quantum dots are further dispersed into other materials or cured or during the device preparation process is reduced; the luminous efficiency of quantum dot is improved effectively, the service life of quantum dot is prolonged; and the provided quantum dot compound particle can be applied to optical devices such as light conversion material of liquid crystal display and has the advantages of high luminous efficiency of quantum dots and long service life.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a method for sealing quantum dots, quantum dot composite particles and applications. Background technique [0002] Quantum dots, also known as semiconductor nanocrystals, are a new type of semiconductor nanomaterials. They have unique photoluminescence and electroluminescence properties due to their quantum size and electron confinement effects. Compared with traditional organic fluorescent dyes, quantum dots have excellent optical properties such as high quantum yield, difficult photolysis, wide excitation, narrow emission, high color purity, and luminous color can be adjusted by controlling the size of quantum dots. At present, it has been developed and used as a new generation of light conversion materials to obtain light with purer colors, higher saturation, and higher luminous efficiency, and is widely used, such as light conversion materials for liquid crystal displays...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/88G02F1/1334
Inventor 李雪付东
Owner TCL CORPORATION
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