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A kind of synthesis method of green environmental protection cspbx3 perovskite quantum dots

A synthetic method, a green and environmentally friendly technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve problems such as environmental pollution, no effective use of raw materials, and inability to recycle, achieve excellent optical properties and high yields , the effect of high utilization of raw materials

Active Publication Date: 2018-10-12
宁波智正伟盈信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, regardless of the traditional octadecene or paraffin system, CsPbX 3 Quantum dot synthesis, or a new type of room temperature perovskite CsPbX 3 The unavoidable generation of quantum dot synthesis can not recycle organic waste liquid, not only does not effectively use raw materials, but also pollutes the environment

Method used

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  • A kind of synthesis method of green environmental protection cspbx3 perovskite quantum dots
  • A kind of synthesis method of green environmental protection cspbx3 perovskite quantum dots

Examples

Experimental program
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Embodiment 1

[0019] Preparation of CsPbBr 3 Perovskite Quantum Dots

[0020] 1. Mix 0.2mmol of CsBr and 0.2mmol of PbBr 2 Add to the flask, add 5ml of N,N-dimethylformamide (DMF) as a solvent, 0.5ml of oleic acid and 0.25ml of oleylamine as a stabilizer, stir to dissolve to form a clear solution.

[0021] 2. Place the clarified solution in a low-pressure distillation device for distillation separation, DMF distillation separation and recovery, cesium, lead, and bromide ions are supersaturated and precipitated due to the evaporation of DMF, forming CsPbBr 3 Perovskite quantum dots.

Embodiment 2

[0023] Preparation of CsPbBr 1 I 2 quantum dot

[0024] 1. Mix 0.2mmol of CsBr and 0.2mmol of PbI 2 Put it into the flask, then add 5ml of dimethyl sulfoxide (DMSO) as a solvent, 0.5ml of oleic acid and 0.25ml of oleylamine as a stabilizer, and stir to dissolve it to form a clear solution.

[0025] 2. Put the clarified solution in a low-pressure distillation device for distillation separation, DMSO distillation separation and recovery, cesium, lead, and bromide ions are supersaturated and precipitated due to the evaporation of DMSO, forming CsPbBr 1 I 2 Perovskite quantum dots.

Embodiment 3

[0027] Preparation of CsPbI 3 Perovskite Quantum Dots

[0028] 1. Mix 0.2mmol of CsI and 0.2mmol of PbI 2 Put it into the flask, add 5ml of N,N-dimethylformamide (DMF) as a solvent, 0.5ml of oleic acid and 0.25ml of oleylamine as a stabilizer, stir to dissolve and form a clear solution.

[0029] 2. Place the clarified solution in a low-pressure distillation device for distillation separation, DMF distillation separation and recovery, cesium, lead, and bromide ions are supersaturated and precipitated due to the evaporation of DMF, forming CsPbI 3 Perovskite quantum dots.

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Abstract

The invention discloses a simple, green, and environment-friendly synthesis method of a CsPbX3 perovskite quantum dot, wherein the X can be Cl, Br, or I. The synthesis method is characterized in that cesium ions, lead ions, and bromine ions are dissolved in a solvent, a proper amount of carboxylic acids and amines is added and taken as the stabilizing agent; a low pressure distillation method is adopted to separate the solvent from the cesium ions, lead ions, and bromine ions; cesium ions, lead ions, and bromine ions are precipitated out due to the evaporation of the solvent, and CsPbX3 perovskite quantum dots are formed. The synthesis method has the advantages that the solvent can be repeatedly used through a low pressure distillation technology, the cost is saved, the method is green and environment-friendly, the reaction temperature is low, the operation is simple, and the synthesis method is suitable for large scale massive production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials for photoelectric display lighting, in particular to a perovskite CsPbX 3 Synthesis of quantum dots. Background technique [0002] Green chemistry refers to the effective use of raw materials in the manufacture and application of chemical products, the reduction or elimination of waste, and the avoidance of environmental burdens due to the discharge of harmful substances. [0003] CaB 3 Perovskite quantum dots, as a new type of semiconductor nano-nano material, consist of an inorganic core composed of hundreds to thousands of atoms, covered with organic ligands, and the particle size is usually 2-15nm. Since quantum dots can controllably adjust their emission spectrum by adjusting the size, the spectral emission of the entire visible light region can be obtained by changing the size and chemical composition of quantum dots. Show great potential and application value. However, regardless ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00C09K11/66
CPCC01G21/006C01P2002/80C09K11/665
Inventor 曹万强方凡刘培朝张慧婕李阳梅明王仁龙曾媛媛
Owner 宁波智正伟盈信息科技有限公司
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