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Zero-dimensional perovskite Cs4PbBr6 micro-crystal capable of regulating and controlling laser performance and preparation method thereof

A microcrystalline and perovskite technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve the problem of not having a good control method for laser performance, and achieve the effect of enhancing laser intensity and optimizing preparation conditions.

Pending Publication Date: 2020-11-20
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on Cs 4 PbBr 6 There are few studies on laser devices of materials and different morphologies have a great influence on laser performance. Currently, for Cs 4 PbBr 6 The laser performance of materials has not yet had a good control method

Method used

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  • Zero-dimensional perovskite Cs4PbBr6 micro-crystal capable of regulating and controlling laser performance and preparation method thereof
  • Zero-dimensional perovskite Cs4PbBr6 micro-crystal capable of regulating and controlling laser performance and preparation method thereof
  • Zero-dimensional perovskite Cs4PbBr6 micro-crystal capable of regulating and controlling laser performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The zero-dimensional perovskite microcrystalline raw materials in this example are dissolved in dimethyl sulfoxide respectively, and a 0.2Mm CTAB-dimethyl sulfoxide solution precursor solution is prepared, and the raw materials cesium bromide and lead bromide are respectively dissolved in the precursor solution, and ensure that the molar concentration ratio cesium bromide: lead bromide: CTAB = 20:5:1, take an equal volume of cesium bromide, lead bromide dimethyl sulfoxide solution and mix it into a glass bottle. Open the glass bottle and put it into a larger airtight container and add dichloromethane into the container as an anti-solvent to ensure that the volume of dimethyl sulfoxide solution: dichloromethane volume = 1:5. React at 40°C for 48 hours , the microcrystalline powder of the product after washing and drying is the zero-dimensional perovskite Cs 4 PbBr 6 Microcrystalline. Microscopic topography such as figure 1 shown.

Embodiment 2

[0040] Configure the precursor solution of 0.2Mm CTAB-dimethyl sulfoxide solution, dissolve the raw materials cesium bromide and lead bromide in the precursor solution respectively, and ensure that the molar concentration ratio cesium bromide:lead bromide:CTAB=20:5 : 1. Take an equal volume of cesium bromide and lead bromide in dimethyl sulfoxide solution and mix them into a glass bottle. Open the glass bottle and put it into a larger airtight container and add dichloride to the container. Methane is used as an anti-solvent to ensure the volume of dimethyl sulfoxide solution: dichloromethane volume = 1:5. The reaction is carried out at 40°C for 72 hours, and the microcrystalline powder of the product after washing and drying is zero-dimensional perovskite Cs 4 PbBr 6 Microcrystalline. Microscopic topography such as figure 2 shown.

Embodiment 3

[0042] Configure the precursor solution of 0.2Mm CTAB-dimethyl sulfoxide solution, dissolve the raw materials cesium bromide and lead bromide in the precursor solution respectively, and ensure that the molar concentration ratio cesium bromide:lead bromide:CTAB=20:5 : 1. Take equal volumes of cesium bromide and dimethyl sulfoxide solution of lead bromide and mix them into a glass bottle, open the glass bottle and put it into a larger airtight container, and add two Chloromethane is used as an anti-solvent to ensure that the volume of dimethyl sulfoxide solution: dichloromethane volume = 1:5. The reaction is carried out at 40°C for 96 hours, and the microcrystalline powder of the product after washing and drying is zero-dimensional perovskite Cs 4 PbBr 6 Microcrystalline, microscopic morphology as shown in image 3 shown.

[0043] In this embodiment, the zero-dimensional perovskite Cs 4 PbBr 6 The relationship between laser intensity and threshold controlled by microcrystals...

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Abstract

The invention relates to a zero-dimensional perovskite Cs4PbBr6 micro-crystal capable of regulating and controlling laser performance and a preparation method thereof, the micro-morphology of the micro-crystal is of a rod-like structure, the size of the micro-crystal is 35-280 [mu]m, and emitted light can be regulated by changing the included angle between the polarization direction of exciting light and the long axis direction of a rod. According to the zero-dimensional perovskite Cs4PbBr6 micro-crystal, cesium bromide and lead bromide are used as raw materials, the preparation method comprises the following steps: taking dichloromethane as an anti-solvent and CTAB as an inducer, carrying out closed reaction in an organic solvent, washing and drying a product to obtain the zero-dimensional perovskite Cs4PbBr6 micro-crystal, and regulating and controlling the laser performance of the micro-nano laser by regulating the size of a micro-rod and polarized light. According to the invention,the intensity of the emitted laser can be regulated and controlled by regulating the size of the micron crystal, and the intensity of the emitted laser is enhanced along with the increase of the size.

Description

technical field [0001] The invention relates to the technical field of laser devices, in particular to the regulation and control of its laser performance. Background technique [0002] The advent of metal halide perovskite semiconductors has revolutionized various research areas in optoelectronics, such as photovoltaics, light-emitting diodes (LEDs), micro / nanolasers, photodetectors, and x-ray imaging. Three-dimensional metal halide perovskite semiconductors have been a hot topic of research in most of the research work performed so far. However, in many reports of 3D metal halide perovskite semiconductors, severe photoluminescence quenching occurs, which limits the application of the material in devices requiring high photoluminescence efficiency. At present, it is found that reducing the dimension of materials, especially after reducing to zero dimension, can significantly improve the phenomenon of photoluminescence quenching, making the research of zero-dimensional pero...

Claims

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Application Information

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IPC IPC(8): C01G21/00
CPCC01G21/006C01P2002/34C01P2004/61C01P2004/60C01P2004/30C01P2004/01
Inventor 孟宪赓张炜光孙逊许宝源
Owner QILU UNIV OF TECH
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