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 low yield, unfavorable large-scale preparation, slow crystal growth rate, etc. The method is simple and easy to implement, with good repeatability

Active Publication Date: 2016-02-24
JINAN UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The crystal growth rate prepared by these methods is slow and th

Method used

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  • Method for rapid preparation of large-area perovskite crystals
  • Method for rapid preparation of large-area perovskite crystals

Examples

Experimental program
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Example Embodiment

[0031] Example 1

[0032] (1) 2.5mmol of PbI 2 Powder and 2.5mmolCH 3 NH 3 1 powder was mixed into a 5mL glass bottle, 2.5mL of 1,4-butyrolactone was added, and after shaking, it was placed in a 60°C constant temperature oven and heated and stirred until the powder was completely dissolved;

[0033] (2) Take 1 mL of dimethyl silicone oil and place it in a 5 mL beaker, and at the same time 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 perovskite solution and add it to dimethyl silicone oil, and black crystals will be formed immediately after 30s.

[0035] The black crystals obtained in Example 1 are subjected to X-ray diffraction pattern analysis (such as figure 1 ), SEM and optical photographs (e.g. figure 2 In (a), (c), (e)) analysis, it is confirmed that the grown black crystal is a perovskite crystal material.

Example Embodiment

[0036] Example 2

[0037] (1) 2.5mmol of PbI 2 Powder and 2.5mmolCH 3 NH 31 powder was mixed and put into a 5mL glass bottle, and 2.5mL of 1,4-butyrolactone was added. After shaking, it was placed in a 60°C constant temperature oven and heated and stirred until the powder was completely dissolved;

[0038] (2) Drop 2mL of dimethylformamide solution into a 5mL beaker, and at the same time, place the beaker on a hot stage at 70°C for heating;

[0039] (3) After the powder in the glass cup in the first step is completely dissolved, take 5 μL of the perovskite solution dropwise into the dimethylformamide solution, and black crystals will be formed in 24s.

[0040] The black crystals obtained in Example 2 were subjected to X-ray diffraction pattern analysis (as figure 1 ) and SEM photographs (eg figure 2 In (b)) analysis, it was confirmed that the grown black crystal was a perovskite single crystal material.

Example Embodiment

[0041] Example 3

[0042] (1) 2.5mmol of PbI 2 powder and 2.5 mmol of CH 3 NH 3 1 powder was mixed and put into a 5mL glass bottle, and 2.5mL of 1,4-butyrolactone was added. After shaking, it was placed in a 60°C constant temperature oven and heated and stirred until the powder was completely dissolved;

[0043] (2) Drop 1.5mL of ether solution into a 5mL beaker, and the beaker is not heated;

[0044] (3) After the powder in the glass cup in the first step is completely dissolved, take 15 μL of perovskite solution dropwise into the ether solution, and black crystals will be formed in 26s.

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

[0046] It can be seen from Example 1, Example 2 and Example 3 that the preparation method of perovskite crystal provided by t...

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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 (SumTC, MathewsN. 2534.), and these factors are closely related to the crystallinity and morphology of the active layer film. Experiments have shown that the larger the perovskite single crystal grain size, the longer...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B7/14
CPCC30B7/14C30B29/22
Inventor 谢伟广周洋洋
Owner JINAN UNIVERSITY
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