Method for growing perovskite monocrystal with liquid-liquid two-phase method

A perovskite and single crystal technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of harsh growth conditions, complicated process, poor controllability, etc., and achieve rapid response, low condition requirements, and low cost. low effect

Active Publication Date: 2017-01-11
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2015, (Angew.Chem2015, 55, 3447–3450) reported an article about MASnI 3 However, the process used to grow single crystals in the literature is relatively complex and cumbersome, and it is difficult to operate in practice; the growth conditions are relatively harsh and the controllability is poor; and the methods reported in the literature grow out The single crystal defects are obvious

Method used

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  • Method for growing perovskite monocrystal with liquid-liquid two-phase method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Prepare a solution containing halogenated compounds;

[0043] Put a magnetic stirring bar into a 100ml tall beaker, measure 35ml hydroiodic acid (HI) and 25ml hypophosphorous acid (H 3 PO 2 ), put it into a beaker, place the whole device on a hot stage, stir and heat, and set the temperature to 15°C, take freshly synthesized methyl iodide (CH 3 NH 3 I), join it. Methyl iodide (CH 3 NH 3 1) After all dissolved, continue to keep stirring for 5h to obtain a solution containing halides with a concentration of 0.833mol / L.

[0044] 2. Weigh the solution that provides the tin source;

[0045] With a clean small bottle, put it on the balance in the glove box, measure the stannous isooctanoate solution in the small bottle with a pipette gun, tighten it, and take it out for later use; The molar ratio of halide ions in the solution is 1:0.9.

[0046] 3. Prepare liquid-liquid two-phase;

[0047] Add the halide-containing solution obtained in step 1 into a clean and dry ...

Embodiment 2

[0053] 1. Prepare a solution containing halogenated compounds;

[0054] Put a magnetic stirring bar into a 100ml tall beaker, measure 80ml hydroiodic acid (HI) and 10ml hypophosphorous acid (H 3 PO 2 ), put it into a beaker, place the whole device on a hot stage, stir and heat, set the temperature to 100°C, weigh 4.77g of freshly synthesized methyl iodide (CH 3 NH 3 I), join it. Methyl iodide (CH 3 NH 3 1) After all dissolved, continue to keep stirring for 8h to obtain a solution containing halides. (concentration is 0.43M)

[0055] 2. Weigh the solution that provides the tin source;

[0056] With a clean small bottle, put it on the balance in the glove box, measure 12.15g stannous isooctanoate solvent in the small bottle with a pipette gun, tighten it, and take it out for later use;

[0057] 3. Prepare liquid-liquid two-phase;

[0058] Add the halide-containing solution obtained in step 1 into a clean and dry crystallization dish, draw up the solvent with a pipette, ...

Embodiment 3

[0064] 1. Prepare a solution containing halogenated compounds;

[0065] Put a magnetic stirring bar into a 100ml tall beaker, measure 25ml hydroiodic acid (HI) and 5ml hypophosphorous acid (H 3 PO 2 ), put it into a beaker, place the whole device on a hot stage, stir and heat, set the temperature to 80°C, weigh 3.18g of freshly synthesized methyl iodide (CH 3 NH 3 I), join them. Methyl iodide (CH 3 NH 3 1) After all dissolved, continue to keep stirring for 5h to obtain a solution containing halides. (concentration is 0.67M)

[0066] 2. Weigh the solution that provides the tin source;

[0067] With a clean small bottle, put it on the balance in the glove box, measure 6.396g stannous isooctanoate solvent in the small bottle with a pipette gun, tighten it, and take it out for later use;

[0068] 3. Prepare liquid-liquid two-phase;

[0069] Add the halide-containing solution obtained in step 1 into a clean and dry crystallization dish, draw up the solvent with a pipette, ...

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Abstract

The invention relates to a method for growing a perovskite monocrystal with a liquid-liquid two-phase method. The method is simple in operation, low in requirement for surrounding environment, non-toxic and free of environmental pollution, and the obtained monocrystal is high in degree of crystallinity and high in stability. The method comprises the following steps: getting a solution providing a tin source, dropwise adding in an immiscible solution containing halides, reacting at the position of a formed separation interface, and growing the perovskite monocrystal. Two immiscible liquid phases are dropwise added to form layering in a liquid-liquid two-phase method reaction manner, the two phases quickly react at the layering position of the interface directly to grow an MASnI3 perovskite monocrystal, and the temperature regulation is restricted, so that the environmentally-friendly leady monocrystal with regular shape, high degree of crystallinity and high stability can be grown. The method has the characteristics of being simple in operation, quick in reaction, low in requirement for reaction, low in cost, high in success rate, non-toxic and pollution-free; and a new thought and a new method are provided for the development of the perovskite material.

Description

technical field [0001] The invention relates to the field of perovskite solar photovoltaic cells, in particular to a method for growing a perovskite single crystal by a liquid-liquid two-phase method. Background technique [0002] Fossil energy is non-renewable and depleted day by day, and its use causes ecological problems such as environmental pollution. Therefore, it is necessary to change the energy organization and find alternative renewable energy. The development of new energy provides an important guarantee for the sustainable development of human civilization. , solar energy, wind energy, nuclear energy, geothermal energy, etc. have gradually attracted people's attention, among which solar photovoltaic is the most promising solution. Solar energy is an inexhaustible and inexhaustible green new energy. How to improve the photoelectric conversion efficiency of solar cells to reduce the cost of photovoltaic power generation is the core research topic in the field of ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C30B7/14
CPCC30B7/14C30B29/12
Inventor 刘生忠姚准赵婉亘
Owner SHAANXI NORMAL UNIV
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