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Method for preparing ABX3 perovskite single crystal film

A single crystal thin film, perovskite technology, applied in single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problem of not preparing perovskite single crystal thin film, and achieve high repeatability and equipment requirements. Simple, high-quality effects

Inactive Publication Date: 2017-05-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of preparation ABX 3 The method of perovskite single crystal thin film, aiming at solving the problem of not preparing perovskite single crystal thin film at present

Method used

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  • Method for preparing ABX3 perovskite single crystal film
  • Method for preparing ABX3 perovskite single crystal film
  • Method for preparing ABX3 perovskite single crystal film

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Experimental program
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Embodiment 1

[0038] The present invention prepares ABX 3 Method for Perovskite Single Crystal Thin Films, A is CH 3 NH 3 + 、H 2 N-CH=NH 2 + , (CH 3 ) 4 N + 、C 7 h 7 + 、Cs + 、C 3 h 11 SN 3 2+ One or more of, B is one or more of Pb, Ge, Sn; X is one or more of Cl, Br, I, and the specific method includes the following steps:

[0039] 1) Weigh one or more of the above-mentioned halogenated organic and inorganic substances containing A and one or more metal compounds containing B into a 50ml beaker that has been added with a stirring bar.

[0040] Among them, the A-containing halides contain organic or inorganic ions with a radius of One or more mixtures of organic or inorganic halogenated compounds, including chloromethylamine (CH 3 NH 3 Cl), chloroformamidine (H 2 N-CH=NH 2 Cl), tetramethylammonium chloride ((CH 3 ) 4 NCl), Chlorazolium (C 7 h 7 Cl), chlorinated 2-isothiourea (C 3 h 11 SN 3 Cl 2 ), methyl bromide (CH 3 NH 3 Br), formamidine bromide (H 2 N-CH=N...

Embodiment 2

[0051] 1. Configure the solution

[0052] Weigh 0.2462g methyl bromide (CH 3 NH 3 Br), 0.8074g lead bromide (PbBr 2 ) into a 50ml beaker with a stirring bar, add 10ml N,N-dimethylformamide (DMF), put it on a magnetic stirrer and stir at room temperature for more than 2 hours to obtain a colorless, clear and transparent precursor solution. is 0.22M, and the molar ratio of bromomethylamine to lead bromide is 1:1.

[0053] 2. Preparation of single crystal thin film

[0054] Take 100 μL of the solution in step 1, drop it in the middle of a clean 10mm×10mm glass slide, and take another glass slide to cover it, so that the solution is evenly distributed between the two glass slides, and place the two glass slides in an atmospheric environment at room temperature. After 5 days, CH can be obtained between the two glass sheets 3 NH 3 PbBr 3 single crystal film.

Embodiment 3

[0056] 1. Configure the solution

[0057] Weigh 0.7833g bromomethylamine (CH 3 NH 3 Br), 2.5690g lead bromide (PbBr 2 ) into a 50ml beaker with a stirring bar, add 10ml N,N-dimethylformamide (DMF), put it on a magnetic stirrer and stir at room temperature for more than 2 hours to obtain a colorless, clear and transparent precursor solution. is 0.7M, and the molar ratio of methyl bromide to lead bromide is 1:1.

[0058] 2. Preparation of single crystal thin film

[0059] Take 100 μL of the solution in step 1, drop it in the middle of a clean 10mm×10mm glass slide, take another glass slide to cover it, so that the solution is evenly distributed between the two glass slides, and place a 5kg glass with a flat bottom on the cover glass slide. put the above device in room temperature and atmospheric environment, after 5 days, CH can be obtained between the two glass sheets 3 NH 3 PbBr 3 single crystal film.

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Abstract

The invention discloses a method for preparing an ABX3 perovskite single crystal film. The method for preparing the ABX3 perovskite single crystal film comprises the following steps: dissolving A-containing halide and a B-containing metallic compound in a solvent M, and ensuring that the mole ratio of the A-contained halide to the B-contained metallic compound is 1:(0.1-2); preparing a perovskite solution with the concentration being 0.05 to 5.0mol / L; dropwise adding the perovskite solution onto a substrate P, and covering the substrate P with a substrate Q; controlling the growth direction of a perovskite single crystal through the substrate P and the substrate Q, so as to ensure that the crystal grows in a gap between the substrate P and the substrate Q, namely to ensure that the perovskite single crystal can grow only in two directions, and forming the perovskite single crystal film with the evaporation of the solvent in the perovskite solution between the two substrates. By adopting the method, a perovskite single crystal film with relatively high quality and relatively large size can be prepared; the method is simple in technology, high in operability and high in repeatability.

Description

technical field [0001] The invention belongs to the field of perovskite technology, in particular to a method for preparing ABX 3 A method for perovskite single crystal thin films. Background technique [0002] With the rapid development of human society, people's demand for energy is also increasing rapidly. The limited traditional fossil energy is consumed in large quantities and is increasingly exhausted, causing a series of problems such as environmental pollution and global warming, which has triggered people's urgent need for sustainable energy. need. The development of new energy sources provides an important guarantee for the sustainable development of human civilization. As a clean and inexhaustible energy source, solar energy can just solve the increasingly acute contradiction between the environment and energy. Currently, a perovskite-structured organic-inorganic hybrid material CH 3 NH 3 wxya 3 It is sparking a revolution in the field of photovoltaics. Sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B29/64C30B7/14
CPCC30B7/14C30B29/12C30B29/64
Inventor 冯晶胡明钰种晓宇
Owner KUNMING UNIV OF SCI & TECH
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