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Preparation method of particle size-controllable quantum dot display material

A particle size and quantum dot technology, which is applied in the field of preparation of quantum dot display materials, can solve the problems such as difficulty in controlling the size uniformity of quantum dots, easy clustering, etc., and achieve the effects of narrow half-peak width, prevention of agglomeration, and high luminous color purity.

Inactive Publication Date: 2017-06-30
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, quantum dots are mainly prepared by "bottom-up" atomic connection, so the size uniformity of quantum dots is difficult to control
Even if quantum dot materials with uniform size are obtained, due to the dot size effect of quantum dots, it is easy to cluster

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A. At room temperature and under the protection of an inert gas, put carbon airgel particles with a pore size of 20nm and methanol into a flask, then add aminopropyltrimethoxysilane to react with the hydroxyl groups inside the airgel pores, A pretreated airgel mixture is obtained. The volume ratio of solvent, airgel, and aminopropyltrimethoxysilane is 1:10:0.1.

[0040]B. Mix the airgel mixture obtained in step A with cadmium nitrate, and the weight ratio of the airgel mixture to the metal ion salt is 1:0.1.

[0041] C. Put the metal ion mixture in step B into the autoclave, fill it with argon, keep the pressure at 0.2MPa, raise the temperature to 120°C, control the pressure at 2MPa, and the stirring speed at 120r / min. Then the non-metallic ion mixture is pressed into the reaction kettle with a high-pressure feeding device, and the temperature is rapidly lowered after reacting for 20 minutes. The product out of the kettle is precipitated with acetone, then dissolved i...

Embodiment 2

[0045] A. At room temperature and under the protection of an inert gas, put graphene airgel particles with a pore size of 17nm and ethanol into a flask, then add aminopropyltrimethoxysilane to react with the hydroxyl groups inside the airgel pores , to obtain the pretreated airgel mixture. The volume ratio of solvent, airgel, and aminopropyltrimethoxysilane is 1:5:0.05.

[0046] B. The preparation of the metal ion mixed solution is to mix the airgel mixed solution obtained in step A with cadmium acetate, and the weight ratio of the airgel mixed solution to the metal ion salt is 1:0.25.

[0047] C. Put the metal ion mixture in step B into the autoclave, fill it with argon, keep the pressure at 1MPa, raise the temperature to 180°C, control the pressure at 4MPa, and the stirring speed at 480r / min. Then, the non-metallic ion mixture is pressed into the reaction kettle with a high-pressure feeding device, and the temperature is rapidly lowered after reacting for 10 minutes. The p...

Embodiment 3

[0051] A. At room temperature and under the protection of an inert gas, put silica airgel particles with a pore size of 12nm and propanol into a flask, then add aminopropyltrimethoxysilane to make it interact with the hydroxyl groups inside the airgel pores The reaction is carried out to obtain a pretreated airgel mixture. The volume ratio of solvent, airgel, and aminopropyltrimethoxysilane is 1:1:0.02.

[0052] B. The preparation of the metal ion mixed solution is to mix the airgel mixed solution obtained in step A with zinc chloride, and the weight ratio of the airgel mixed solution to the metal ion salt is 1:0.5.

[0053] C. Put the metal ion mixture in step B into a high-pressure reactor, fill it with argon, keep the pressure at 2MPa, raise the temperature to 240°C, control the pressure at 8MPa, and the stirring speed at 960r / min. Then the non-metallic ion mixture is pressed into the reaction kettle with a high-pressure feeding device, and the temperature is rapidly lower...

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Abstract

The invention provides a preparation method of a particle size-controllable quantum dot display material. The preparation method comprises the following steps: by taking aerogel as a reaction carrier, modifying the aerogel with amino propyl trimethoxysilane, adding soluble metal ion salt, and adsorbing metal ions into pores of the aerogel under the complexing action of NH<4+>, thereby forming a metal ion precursor mixing solution; putting the metal ion precursor mixing solution into a high-pressure reaction kettle, injecting nonmetal ion source mixing solution into the reaction kettle at high temperature and high pressure, performing solvothermal reaction at certain temperature and pressure, and finally performing centrifugal settling, cleaning and drying, thereby obtaining quantum dot materials assembled in the pores of the aerogel. Synthesis of quantum dots is performed in the pores of the aerogel; the particle size of the quantum dots mainly depends on the size and uniformity of aerogel control, but other factors have little influence on the particle size of the quantum dots; the preparation method is easy and quick to operate, feasible, high in efficiency and environment-friendly, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of photoelectric materials and nanometer materials, and in particular relates to a preparation method of quantum dot display materials with controllable particle size. Background technique [0002] Quantum dots, also known as nanocrystals, generally have a particle size between 1 and 10nm. Since electrons and holes are quantum-confined, the continuous energy band structure becomes a discrete energy level structure with molecular characteristics. Can emit fluorescence. Based on quantum effects, quantum dots have broad application prospects in solar cells, light-emitting devices, optical biomarkers and other fields. Scientists have invented many different methods to make quantum dots, and expect this nanomaterial to have great potential for application in nanoelectronics in the 21st century. [0003] Semiconductor colloidal quantum dots have outstanding characteristics such as solution preparation, easy processing, ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/56C09K11/02B82Y40/00
CPCC09K11/88B82Y40/00C09K11/025C09K11/565
Inventor 陈庆曾军堂王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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