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Method for growing ABX3 perovskite single crystals in low-temperature solution

A low-temperature solution, perovskite technology, applied in the field of solar cells, can solve the problems of harsh growth conditions, small single crystal size, poor controllability, etc., and achieve the effects of large solution concentration, low equipment requirements, and low cost

Active Publication Date: 2015-09-16
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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; the most important thing is that the single crystals grown by the methods reported in the literature are smaller in size. small, about 10mm

Method used

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  • Method for growing ABX3 perovskite single crystals in low-temperature solution
  • Method for growing ABX3 perovskite single crystals in low-temperature solution
  • Method for growing ABX3 perovskite single crystals in low-temperature solution

Examples

Experimental program
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Effect test

Embodiment 1

[0052] 1. Preparation of single crystal (seed crystal) growth solution

[0053] Take by weighing 0.159g synthesized methyl iodide (CH 3 NH 3 1), add to a 100mL tall beaker, put a magnetic stirrer, measure 20mL gamma-butyrolactone (GBA) and add, stir and heat at 20°C on a magnetic stirring heater. Methyl iodide (CH 3 NH 3 1) after all dissolving, weigh again 0.461g lead iodide (PbI 2 ) was added, and continued to stir and heat on a magnetic stirring heater at 20°C for more than 12 hours to obtain a single crystal growth solution (concentration: 0.05M, molar ratio of metal ions of metal compounds to halide ions: 1:1).

[0054] 2. Preparation of single crystal growth solution

[0055] Take by weighing 3.91g synthetic iodomethylamine (CH 3 NH 3 1), add to a 100mL tall beaker, put a magnetic stirrer, measure 20mL gamma-butyrolactone (GBA) and add, stir and heat at 20°C on a magnetic stirring heater. Methyl iodide (CH 3 NH 3 1) After all dissolving, take by weighing 11.34g...

Embodiment 2

[0065] 1. Preparation of single crystal (seed crystal) growth solution

[0066] Take by weighing 0.318g synthesized methyl iodide (CH 3 NH 3 1), add it to a 100mL tall beaker, put a magnetic stirrer, measure 20mL gamma-butyrolactone (GBA) and add it, stir and heat at 40°C on a magnetic stirring heater. Methyl iodide (CH 3 NH 3 1) after all dissolving, weigh again 0.461g lead iodide (PbI 2 ) was added, and continued to stir and heat on a magnetic stirring heater at 40°C for more than 12 hours to obtain a single crystal growth solution (concentration: 0.05M, molar ratio of metal ions of metal compounds to halide ions: 1:2).

[0067] 2. Preparation of single crystal growth solution

[0068] Take by weighing 7.82g synthesized methyl iodide (CH 3 NH 3 1), add it to a 100mL tall beaker, put a magnetic stirrer, measure 20mL gamma-butyrolactone (GBA) and add it, stir and heat at 40°C on a magnetic stirring heater. Methyl iodide (CH 3 NH 31) After all dissolving, take by weig...

Embodiment 3

[0078] 1. Preparation of single crystal (seed crystal) growth solution

[0079] Take by weighing 0.112g synthesized methyl bromide (CH 3 NH 3 Br) into a 100mL tall beaker, put a magnetic stirrer, measure 20mL of N,N-dimethylformamide (DMF) and add, stir and heat on a magnetic stirring heater at 70°C. Bromomethylamine (CH 3 NH 3 After Br) is all dissolved, weigh 0.367g lead bromide (PbBr 2 ) was added, and continued to stir and heat on a magnetic stirring heater at 70°C for more than 12 hours to obtain a single crystal growth solution (concentration: 0.05M, molar ratio of metal ions of metal compounds to halides: 1:1).

[0080] 2. Preparation of single crystal growth solution

[0081] Take by weighing 1.12g synthesized methyl bromide (CH 3 NH 3 Br) into a 100mL tall beaker, put a magnetic stirrer, measure 20mL of N,N-dimethylformamide (DMF) and add, stir and heat on a magnetic stirring heater at 70°C. Bromomethylamine (CH 3 NH 3 After Br) is all dissolved, take by wei...

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Abstract

The invention provides a method for growing ABX3 perovskite single crystals in a low-temperature solution. According to the invention, a continuous growing method is adopted, and the ABX3 perovskite single crystals are rapidly grown in the low-temperature solution continuously with multiple periods and different stages. The concentration of the solution is high, and the raw materials required by growing are uniformly dissolved. Growing periods are added, and growing conditions are finely controlled, such that ABX3 perovskite single crystals with large sizes, regular shapes and high quality can be easily obtained. The method has the advantages of simple process, high operability, mild growing conditions, low required temperature, low energy consumption, low equipment requirement, low cost, high success rate, fast single crystal growth speed, fewer defects, good stability, large single crystal size (>10mm)*(>10mm)*(>10mm), and the like. Therefore, basic mechanism theoretical researches on perovskite materials and related optoelectronic devices (including solar cell, photodetector, LED and laser) are promoted.

Description

【Technical field】 [0001] The invention belongs to the field of solar cells, in particular to a method for growing ABX in a low-temperature solution 3 Methods for perovskite single crystals. 【Background technique】 [0002] With the rapid development of economic globalization, the demand for energy in countries around the world is increasing year by year, and traditional fossil energy sources such as coal, oil, and natural gas are gradually exhausted, and the use of traditional energy sources also brings a series of ecological and environmental problems. Therefore, changing the current energy structure and looking for renewable, economical, green and environmentally friendly clean energy supplies, such as solar energy, hydrogen energy, wind energy, tidal energy, etc., has become a research topic that countries around the world pay close attention to. Solar energy is the most abundant clean energy in the world, and its annual radiation to the surface of the earth is far more t...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B29/54C30B7/14
Inventor 刘生忠刘渝城杨周
Owner SHAANXI NORMAL UNIV
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