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A kind of preparation method of led quantum dot coating liquid

A coating solution and quantum dot technology, applied in the field of preparation of LED quantum dot coating solution, can solve the problems of complicated preparation process, poor film uniformity of LED quantum dot coating solution, unsuitable for industrialized mass production, etc. Wide range of raw material sources, simple and efficient protection, and easy large-scale industrial production

Active Publication Date: 2019-07-02
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical defects that the preparation process of LED quantum dot coating liquid in the prior art is cumbersome, it is not suitable for industrialized large-scale production, and the film-forming uniformity of the prepared LED quantum dot coating liquid is poor, the present invention proposes a kind of LED quantum dot coating The preparation method of the liquid is to configure the colloidal solution first. In the mechanical colloid mill, the reaction of the colloid is mild, and the prepared quantum dot particles are uniform and have good film-forming uniformity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The aqueous solution of cadmium chloride with a concentration of 10% by mass, citric acid, and polyvinyl alcohol colloid with a concentration of 35-60% by mass are used to form a mixed solution, which is stirred evenly. The mass ratio of aqueous solution, citric acid and polyvinyl alcohol colloid is 1:0.01:0.8;

[0031] (2) Add the mixed liquid and polysiloxane to the colloid mill at the same time, control the speed of adding the mixed liquid and polysiloxane to the colloid mill at 0.1mL / s, and grind under the protection of nitrogen with a purity of 99.99% , keep the grinding speed at 100rpm;

[0032] (3) Slowly add a trialkylphosphine selenide solution with a mass percent concentration of 10% during the grinding process. The addition rate of the trialkylphosphine selenide solution is 500 μL / s, and the reaction temperature is controlled to maintain within the range of 60 ° C. The trialkylphosphine selenide solution is reacted with cadmium ions, and then concentrate...

Embodiment 2

[0035] (1) Mix cadmium nitrate, ethylenediaminetetraacetic acid, and polyacrylamide colloid with a mass percentage concentration of 15% and a mass percentage concentration of 40%, and keep stirring evenly. The cadmium nitrate solution, ethylene diamine tetraacetic acid The mass ratio of amine tetraacetic acid and polyacrylamide colloid is 1:0.1:1;

[0036](2) Add the mixed liquid and polysiloxane to the colloid mill at the same time, control the speed of adding the mixed liquid and polysiloxane to the colloid mill at 0.4mL / s, and grind under the protection of nitrogen with a purity of 99.99% , the grinding speed is 150rpm;

[0037] (3) Slowly add trienyl phosphine selenide solution with a concentration of 12% by mass during the grinding process, the addition rate of trienyl phosphine selenide solution is 550 μL / s, and the reaction temperature is controlled to maintain within 62 °C , the trienylphosphine selenide solution reacts with chelated cadmium ions, and then undergoes c...

Embodiment 3

[0040] (1) The aqueous solution of cadmium perchlorate, aminotriacetic acid, and polyethylene oxide colloids with a mass percentage concentration of 15% are used to form a mixed solution, and the mixture is stirred evenly, and the high The mass ratio of cadmium chlorate aqueous solution, aminotriacetic acid and polyethylene oxide colloid solution is 1:0.0.2:2.5;

[0041] (2) Add the mixed liquid and polysiloxane to the colloid mill at the same time, control the speed of adding the mixed liquid and polysiloxane to the colloid mill at 0.9mL / s, and grind under the protection of nitrogen with a purity of 99.99% , the grinding speed is 200rpm;

[0042] (3) Slowly add the alkylaminoselenide solution with a mass percent concentration of 17% during the grinding process. The addition rate of the alkylaminoselenide solution is 650 μL / s, and the reaction temperature is controlled to maintain within the range of 70 °C. The base amino selenide solution reacts chemically with the chelated ...

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PUM

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Abstract

The invention provides a preparation method of LED quantum dot coating solution. The preparation method comprises the steps of: taking cadmium ion precursor solution, a chelating agent and a colloid as the raw materials, mixing the three to form mixed solution; assisting to process by using polysiloxane, grinding by utilizing the colloid under the nitrogen protection condition, slowly adding selenium precursor solution in the grinding process, and reacting the selenium precursor solution with chelated cadmium ions to form dispersed cadmium selenide quantum dot coating solution. According to the preparation method provided by the invention, due to the chelating agent, cadmium selenide quantum dots exist in the form of independent homomorphic nanoparticles in the reaction process; therefore, the cadmium selenide quantum dots have good film forming property; and furthermore, the method is simple in preparation process and good in repeatability, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation, in particular to a method for preparing an LED quantum dot coating liquid. Background technique [0002] LED is an electronic component that can emit light when it is powered on. It is a light-emitting component made of semiconductor materials. The material uses III-V chemical elements (such as: gallium phosphide (GaP), gallium arsenide (GaAs), etc.). The principle of light emission is Converting electrical energy into light energy means applying current to the compound semiconductor. Through the recombination of electrons and holes, the energy will be released in the form of light to achieve the effect of light emission. It belongs to cold light emission and has a life span of more than 100,000 hours. The biggest features of LED are: no warm-up time, fast response (about 10^-9 seconds), small size, low power consumption, low pollution, suitable for mass production, high reliability, and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00
CPCH01L33/0083
Inventor 陈庆曾军堂陈兵
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD