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Polymer-coated perovskite quantum dots and preparation method thereof

A perovskite and polymer technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as coating and complete surface of difficult perovskite quantum dots, so as to improve luminous efficiency, reduce luminous defects, and improve The effect of quantum yield

Inactive Publication Date: 2019-02-05
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a polymer-coated perovskite quantum dot and its preparation method, aiming to solve the problem of coagulation and precipitation of perovskite quantum dots with thiocarboxylic acid ligands under acidic conditions and the It is difficult for ligands to completely cover the surface of perovskite quantum dots

Method used

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preparation example Construction

[0012] Embodiments of the present invention provide a method for preparing polymer-coated perovskite quantum dots, comprising the following steps:

[0013] S01. Provide perovskite quantum dots, disperse the perovskite quantum dots in a solvent to form a perovskite quantum dot solution, wherein the perovskite quantum dots include thiocarboxylic acid ligands;

[0014] S02. Add polymer monomers and photoinitiators to the perovskite quantum dot solution, and react to generate polymer-coated perovskite quantum dots under ultraviolet irradiation conditions, wherein the polymer monomers contain amino groups unsaturated polymer monomers.

[0015] Specifically, in the above step S01, the titanium ore quantum dots of the present invention include inorganic perovskite quantum and organic-inorganic perovskite quantum, such as CsPbX 3 Quantum dots, where X is Cl, Br or I, CH 3 NH 3 wxya 3 , wherein X is Cl, Br or I. The surface ligands of the perovskite quantum dots include thiocarbox...

Embodiment 1

[0038] A preparation method of polymer-coated perovskite quantum dots, comprising the following steps:

[0039] S11. Provide perovskite quantum dots, disperse 0.02g of perovskite quantum dots in 100ml of n-hexane to form a perovskite quantum dot solution, wherein the perovskite quantum dots are calcium containing thiocarboxylic acid ligands Titanium ore quantum dots, the preparation method comprises the following steps:

[0040] S111. Add 0.332g of potassium iodide, 58ml of octadecene and 3.3ml of 2-mercaptopropionic acid into a 100ml three-necked flask, heat at 100°C for 1 hour, then raise the temperature to 160°C under nitrogen protection, and react for 0.5 hours Lower the temperature to 100°C and keep the temperature at 100°C to prepare the first precursor;

[0041] S112. Add 0.189 mol of lead iodide and 6 ml of octadecene into a 25 ml three-necked flask, and react under vacuum at 120° C. for 1 hour. Then 0.5 ml of 2-mercaptopropionic acid and 0.5 ml of oleylamine were ad...

Embodiment 2

[0045] A preparation method of polymer-coated perovskite quantum dots, comprising the following steps:

[0046] S21. Provide perovskite quantum dots, dissolve 0.035g of perovskite quantum dots in 210ml of n-hexane to form a perovskite quantum dot solution, wherein the perovskite quantum dots are calcium containing thiocarboxylic acid ligands Titanium ore quantum dots, the preparation method comprises the following steps:

[0047] S211. Get 0.421g of cesium chloride, 35ml of octadecene and 2.5ml of 2-mercaptopropionic acid into a 100ml three-necked flask, heat at 130°C for 1 hour, then raise the temperature to 160°C under nitrogen protection, and react for 1.5 Hours later, the temperature was lowered to 100°C, and the temperature was kept at 100°C to prepare the first precursor;

[0048] S212. Add 0.164 mol of lead chloride and 4.8 ml of octadecene into a 25 ml three-necked flask, and react under vacuum at 120° C. for 1 hour. Then 0.8 ml of 2-mercaptopropionic acid and 0.6 ml...

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Abstract

The invention provides a preparation method of polymer-coated perovskite quantum dots. The preparation method comprises the following steps: supplying perovskite quantum dots, and dispersing the perovskite quantum dots in a solvent to form a perovskite quantum dot solution, wherein ligands on the surfaces of the perovskite quantum dots comprise thiocarboxylic acid ligands; adding a polymer monomerand a photoinitiator into the perovskite quantum dot solution for reacting under an ultraviolet radiation condition in which the water vapor content is less than 30 percent to generate the polymer-coated perovskite quantum dots, wherein the polymer monomer is an unsaturated polymer monomer containing amidogen.

Description

technical field [0001] The invention belongs to the technical field of preparation of perovskite quantum dots, and in particular relates to a polymer coating and a preparation method of perovskite quantum dots. Background technique [0002] In recent years, inorganic perovskite quantum dots have become a new member of the "quantum dot family" that has attracted much attention and research. Inorganic perovskite quantum dots have the advantages of narrow fluorescence emission half-peak width, high fluorescence quantum yield and easy modification of various functional groups on the surface; and biochemical properties also have unparalleled characteristics, such as good Biocompatibility, low cytotoxicity, these superior optical properties make inorganic perovskite quantum dots have broad application prospects in the fields of biochemical and optical analysis and detection. [0003] At present, the common perovskite quantum dots generally use thiocarboxylic acid ligands as stabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66C09K11/06C08F120/60C08F2/50C08G73/04
CPCC08F2/50C08F120/60C08G73/0206C09K11/025C09K11/06C09K11/665
Inventor 邓承雨杨一行钱磊谢相伟
Owner TCL CORPORATION
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