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Anisotropic cesium-lead-chlorine perovskite micron sheet and preparation method thereof

An anisotropic, perovskite technology, applied in chemical instruments and methods, lead compounds, nanotechnology, etc., can solve the problems of unfavorable intrinsic properties of perovskite, residual organic matter, etc., to achieve adjustable size and simple process. Effect

Inactive Publication Date: 2020-03-24
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There will be a large amount of organic residues on the surface and inside of the obtained product, which is very unfavorable for the study of the intrinsic properties of perovskite
So far, the synthesis of pure inorganic perovskites without organic stabilizers has been rarely reported.

Method used

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  • Anisotropic cesium-lead-chlorine perovskite micron sheet and preparation method thereof
  • Anisotropic cesium-lead-chlorine perovskite micron sheet and preparation method thereof
  • Anisotropic cesium-lead-chlorine perovskite micron sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) 27.8mg PbCl 2 , 5.04 mg CsCl, and 20 mg CH 3 (CH 2 ) 3 NH 3 I was dissolved in 1ml DMSO respectively, and 0.1ml PbCl 2 DMSO solution, 0.5ml CsCl in DMSO solution, 0.1ml CH 3 (CH 2 ) 3 NH 3 The DMSO solution of I was mixed at 25°C for 5 h to obtain a precursor solution;

[0023] 2) Si / SiO 2 The substrate was preheated at 70°C for 20 minutes, and 50 μL of the precursor solution was dropped onto the hot substrate, and continued heating for 20 minutes;

[0024] 3) Rinse the substrate with ethyl acetate to obtain CsPbCl with a lateral dimension of 1000 μm and a thickness of 10 μm 3 Perovskite microsheets.

[0025] For the prepared CsPbCl 3 Scanning electron microscopy, X-ray diffraction and polarizing microscopy of perovskite microflakes for analysis of CsPbCl 3 The structural characteristics of perovskite microsheets, the results are as follows:

[0026] figure 1 It is the scanning electron microscope image of the cesium lead chloride perovskite microsheet...

Embodiment 2

[0031] 1) 27.8mg PbCl 2 , 5.04 mg CsCl, and 20 mg CH 3 (CH 2 ) 3 NH 3 I was dissolved in 1 ml DMSO respectively, and 0.1 ml PbCl 2 DMSO solution, 0.16ml CsCl in DMSO solution, 0.1ml CH 3 (CH 2 ) 3 NH 3 The DMSO solution of I was mixed at 60°C for 0.1 h to obtain a precursor solution;

[0032] 2) Preheat the Si substrate at 100°C for 1 min, take 5 μL of precursor solution dropwise onto the hot substrate, and continue heating for 5 min;

[0033] 3) Rinse the substrate with isopropanol to obtain anisotropic CsPbCl with a lateral dimension of 1 μm and a thickness of 50 nm 3 Perovskite microsheets.

Embodiment 3

[0035] 1) 27.8mg PbCl 2 , 5.04 mg CsCl, and 20 mg CH 3 (CH 2 ) 3 NH 3 I was dissolved in 1ml DMSO respectively, and 0.1ml PbCl 2 DMSO solution, 0.5ml CsCl in DMSO solution, 0.1ml CH 3 (CH 2 ) 3 NH 3 The DMSO solution of I was mixed at 40°C for 3 h to obtain a precursor solution;

[0036] 2) Si / SiO 2 The substrate was preheated at 80°C for 10 minutes, and 10 μL of the precursor solution was dropped onto the hot substrate, and continued heating for 10 minutes;

[0037] 3) Rinse the substrate with toluene to obtain anisotropic CsPbCl with a lateral dimension of 100 μm and a thickness of 5 μm 3 Perovskite microsheets.

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Abstract

The invention discloses an anisotropic cesium-lead-chlorine perovskite micron sheet and a preparation method thereof. The preparation method includes: firstly dissolving PbCl2, CsCl and CH3(CH2)3NH3Iin DMSO respectively to obtain a precursor solution, then dripping the precursor solution onto a preheated substrate, further conducting heating for 5-20min, and flushing the substrate with a solventto obtain the anisotropic CsPbCl3 perovskite micron sheet. The method provided by the invention has the characteristics of simple process, no need for vacuum and low-temperature operation, and the obtained cesium-lead-chlorine perovskite micron sheet has optical anisotropy and can be applied to polarization detectors, sensors and other fields.

Description

technical field [0001] The invention relates to the technical field of inorganic perovskite preparation methods, in particular to an anisotropic cesium-lead-chloride perovskite microsheet and a preparation method thereof. Background technique [0002] Perovskite halides have shown excellent performance in optoelectronic fields such as sensors, diodes, lasers, and solar cells, and have been extensively studied in recent years. The emergence of organic-inorganic hybrid perovskites has greatly promoted the development of solar cells and is expected to reduce their production costs. However, organic components greatly reduce the stability of perovskite, making it easy to decompose in high temperature or high humidity environment, hindering the practical application of organic-inorganic hybrid perovskite. [0003] Pure inorganic perovskites have more excellent environmental stability and have attracted the attention of scientists in recent years. The current research mainly foc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/00B82Y30/00
CPCB82Y30/00C01G21/006C01P2002/72C01P2004/02C01P2004/03C01P2004/38
Inventor 胡晓珍于水森周俊宏史开源黄赢莹
Owner NANJING UNIV OF INFORMATION SCI & TECH
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