Method for preparing CsPbX3 perovskite quantum dots rapidly and simply at room temperature

A technology of perovskite and quantum dots, applied in chemical instruments and methods, nanotechnology, nano-optics, etc., can solve the problems of high toxicity, high price, and restrictions on the production and application of perovskite quantum dots, and achieve low toxicity, The effect of reducing production cost and improving solubility

Active Publication Date: 2018-02-27
HUBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CsPbX is currently prepared at room temperature 3 The method of perovskite quantum dots is mainly the dissolution recrystallization method (references: X.Li, D.Yu, F.Cao, Y.Gu, Y.Wei, Y.Wu, J.Song and H.Zeng, Adv .Funct.Mater., 2016,26,2435–2445) This method mainly uses d

Method used

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  • Method for preparing CsPbX3 perovskite quantum dots rapidly and simply at room temperature
  • Method for preparing CsPbX3 perovskite quantum dots rapidly and simply at room temperature
  • Method for preparing CsPbX3 perovskite quantum dots rapidly and simply at room temperature

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Embodiment 1

[0019] 1. Dissolve 0.1mmol of cesium hydroxide, 0.1mmol of lead oleate and 0.3mmol of tetraoctylammonium bromide in 10ml of absolute ethanol, then add 1mL of oleic acid and 0.5mL of oleylamine as surfactants , stirring gently to dissolve completely;

[0020] 2. Transfer 1ml of the above mixed solution to 10mL of toluene, stir to make the reaction complete, and obtain CsPbBr 3 Perovskite quantum dots.

Embodiment 2

[0022] 1. Dissolve 0.1mmol of cesium hydroxide and 0.1mmol of lead oleate, 0.15mmol of tetraoctyl ammonium bromide and 0.15mmol of tetraoctyl ammonium iodide in 10ml of absolute ethanol, and then add 1mL of oleic acid and 0.5mL of oleylamine as a surfactant, stirred slightly to make it completely dissolved;

[0023] 2. Transfer 1ml of the above mixed solution to 10mL of toluene, stir to make the reaction complete, and obtain CsPbBr 1.5 I 1.5 Perovskite quantum dots.

Embodiment 3

[0025] 1. Dissolve 0.1mmol of cesium hydroxide, 0.1mmol of lead oleate and 0.3mmol of tetra-n-octyl ammonium iodide in 10ml of absolute ethanol, then add 1mL of oleic acid and 0.5mL of oleylamine as surface active agent, stir gently to dissolve completely;

[0026] 2. Transfer 1ml of the above mixed solution to 10mL of toluene, stir to make the reaction complete, and obtain CsPbI 3 Perovskite quantum dots.

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Abstract

The invention discloses a method for preparing CsPbX3 perovskite quantum dots rapidly and simply at room temperature. The method comprises the following steps of: a) dissolving cesium hydroxide, a lead source and a halogen-ammonium source in an anhydrous ethanol solvent according to a molar ratio of 1:1:3, adding a slightly-excessive amount of oleic-acid oleylamine as a surface active agent according to equimolar negative and positive ions, slightly stirring for completely dissolving the oleic-acid oleylamine to obtain a precursor; b) transferring a precursor solution into organic solvents such as methyl benzene, stirring for completely reaction of the mixture, and thus obtaining the CsPbX3 perovskite quantum dots at the room temperature. The method for preparing the CsPbX3 perovskite quantum dots rapidly and simply at the room temperature disclosed by the invention has the advantages that the anhydrous ethanol is adopted as a polar solvent, simultaneously the cesium hydroxide, lead oleate and tetraoctyl ammonium halide with easier dissolution are adopted to replace CsX and PbX2, and the traditional solvents such as DMF (Dimethyl Formamide) with larger toxicity are replaced, so that the synthetic stability of the CsPbX3 perovskite quantum dots is better; due to room-temperature operation, the method is lower in cost and more convenient in operation, is more environmentally friendly and is suitable for large-scale batch production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials for photoelectric display lighting, in particular to a fast and simple preparation of room temperature CsPbX 3 (X=Cl, Br, I, or a mixture thereof) a synthetic method for perovskite quantum dots. Background technique [0002] In recent years, due to the improvement of people's awareness of environmental protection, "environmentally friendly chemistry" has attracted more and more people's attention, especially in production activities, some methods and processes with heavy pollution, high toxicity, and high energy consumption are gradually being used The market has been eliminated, and the process methods that are friendly to the environment are becoming more and more popular. CaB 3 Perovskite quantum dots, as a new type of semiconductor nanomaterial, consist of an inorganic core composed of hundreds to thousands of atoms, covered with organic ligands, and the particle size is usually 2-15nm...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 曹万强王仁龙方凡刘培朝张慧婕李阳梅明曾媛媛
Owner HUBEI UNIV
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