A method for rapid preparation of large-area perovskite crystals

A perovskite, large-area technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of slow crystal growth, unfavorable large-scale preparation, low yield, etc., and the method is simple and easy to implement. , high yield, good repeatability

Active Publication Date: 2018-06-12
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crystal growth rate prepared by these methods is slow and the yield is low, which is not conducive to large-scale preparation

Method used

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  • A method for rapid preparation of large-area perovskite crystals
  • A method for rapid preparation of large-area perovskite crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) 2.5mmol of PbI 2 powder and 2.5 mmol CH 3 NH 3 I Mix the powder into a 5mL glass bottle, add 2.5mL of 1,4-butyrolactone, shake well, heat and stir in a constant temperature oven at 60°C until the powder is completely dissolved;

[0033] (2) Take 1mL of simethicone oil and place it in a 5mL beaker, and heat the beaker on a hot stage at 150°C;

[0034] (3) After the powder in the glass bottle in the first step is completely dissolved, take 10 μL of the perovskite solution and add it to the simethicone oil, and black crystals are formed immediately after 30 seconds.

[0035] Carry out X-ray diffraction pattern analysis to the black crystal gained in embodiment 1 (as figure 1 ), SEM and optical photographs (such as figure 2 In (a), (c), (e)) analysis, it was confirmed that the grown black crystal was a perovskite crystal material.

Embodiment 2

[0037] (1) 2.5mmol of PbI 2 powder and 2.5 mmol CH 3 NH3 I Mix the powder into a 5mL glass bottle, add 2.5mL of 1,4-butyrolactone, shake well, heat and stir in a constant temperature oven at 60°C until the powder is completely dissolved;

[0038] (2) Take 2mL of dimethylformamide solution and drop it into a 5mL beaker, while heating the beaker on a hot stage at 70°C;

[0039] (3) After the powder in the glass cup is completely dissolved in the first step, take 5 μL of the perovskite solution and drop it into the dimethylformamide solution, and black crystals will form within 24 seconds.

[0040] Carry out X-ray diffraction pattern analysis to the black crystal gained in embodiment 2 (as figure 1 ) and SEM photographs (such as figure 2 In (b)) analysis, it was confirmed that the grown black crystal was a perovskite single crystal material.

Embodiment 3

[0042] (1) 2.5mmol of PbI 2 powder and 2.5 mmol of CH 3 NH 3 I Mix the powder into a 5mL glass bottle, add 2.5mL of 1,4-butyrolactone, shake well, heat and stir in a constant temperature oven at 60°C until the powder is completely dissolved;

[0043] (2) Take 1.5mL ether solution and drop it into a 5mL beaker without heating the beaker;

[0044] (3) After the powder in the glass cup is completely dissolved in the first step, take 15 μL of the perovskite solution and drop it into the ether solution, and black crystals will form within 26 seconds.

[0045] Carry out X-ray diffraction pattern analysis to the black crystal gained in embodiment 3 (as figure 1 ) and SEM photographs (such as figure 2 In (f)) analysis, it was confirmed that the grown black crystal was a perovskite single crystal material.

[0046] As can be seen from Example 1, Example 2 and Example 3, the preparation method of the perovskite crystal provided by the present invention has a crystal growth time of...

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Abstract

The invention belongs to the semiconductor optoelectronic material and device preparation technology field, and discloses a method for rapid preparation of large-area perovskite crystals. The method comprises the following steps: certain amounts of lead halide and methyl ammonium halide are weighed, mixing is carried out, then 1,4-butyrolactone, dissolving is carried out, and a perovskite solution is prepared; then the prepared perovskite solution is added to an organic solvent with a certain amount, and perovskite crystals are precipitated. Perovskite crystals are precipitated rapidly through a solution extraction mode, the method is simple and practical, the repeatability is high, external requirements are not high, different organic solvents can be selected for growth according to practical demands to obtain monocrystalline particles with different sizes, the maximum monocrystalline particle size can reach dozens of micron and thus the monocrystalline particles have great advantages at the aspect of manufacturing of photoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of semiconductor optoelectronic materials and device preparation, in particular to a method for rapidly preparing large-area perovskite crystals. Background technique [0002] Perovskite (CH 3 NH 3 PB 3 , CH 3 NH 3 PbCl 3 , CH 3 NH 3 PbBr 3 ) materials are widely used as active layers of solar cells due to their advantages such as high absorption coefficient, ambipolar electron-hole transport, and cheap and convenient thin film deposition techniques. At present, the efficiency of solar cells based on perovskite active layers has reached 20.1%. However, the diffusion length, lifetime and mobility of carriers in the perovskite active layer are key factors affecting its use as a battery (Sum T C, Mathews N. Advancements inperovskite solar cells: photophysics behind the photovoltaics[J].Energy&Environmental Science, 2014,7(8):2518-2534.), and these factors are closely related to the crystallinity and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B7/14
CPCC30B7/14C30B29/22
Inventor 谢伟广周洋洋
Owner JINAN UNIVERSITY
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