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Preparation method of perovskite single crystals

A perovskite and single crystal technology is applied in the field of preparation of perovskite single crystals, which can solve the problems of long time consumption, low solution utilization rate, and large number of crystal nuclei of perovskite single crystals, so as to reduce the number of fine crystal nuclei, The effect of improved utilization and high quality

Active Publication Date: 2017-05-10
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the defects of the prior art, the object of the present invention is to provide a method for preparing a perovskite single crystal, aiming at solving the problem of the large number of crystal nuclei in the existing method for preparing a perovskite single crystal, which leads to the preparation of a perovskite single crystal. Technical issues of long time consumption, low quality and low solution utilization

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  • Preparation method of perovskite single crystals

Examples

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no. 1 example

[0027] The first embodiment of the preparation method of the perovskite single crystal provided by the present invention, its specific preparation steps are as follows:

[0028] (1) Weigh 1.59g of methylamine iodide (CH 3 NH 3 I, MAI) and 3.688g lead iodide (PbI 2 ), dissolved in 10mL of γ-butyrolactone (GBL), stirring and dissolving at 60°C for 12-24h to obtain a perovskite solution;

[0029] (2) Filter the perovskite solution with a 0.45 μm filter head;

[0030] (3) Clean the PTFE container with deionized water for 10 minutes, clean the PTFE container with acetone for 10 minutes, clean the PTFE container with isopropanol for 10 minutes, clean the PTFE container with deionized water for 10 minutes, and then dry it with a nitrogen gun;

[0031] (4) Take 10mL of the filtered perovskite solution and carefully place it in a PTFE container, heat it on a heating platform at 100°C to slowly evaporate the solvent, the perovskite solution reaches supersaturation, and the crystals g...

no. 4 example

[0043] The fourth embodiment of the preparation method of the perovskite single crystal provided by the present invention, its specific preparation steps are as follows:

[0044] (1) Weigh 1.12g of methyl bromide (CH 3 NH 3 Br) and 3.688g lead bromide (PbI 2 ), dissolved in 10mL of N,N-dimethylformamide (DMF) and γ-butyrolactone (GBL) mixed solution, the volume ratio of N,N-dimethylformamide and γ-butyrolactone is 2:8, stirring and dissolving at 60°C for 12-14h to obtain a perovskite solution;

[0045] (2) Obtain the perovskite solution by filtering with a 0.45 μm filter head;

[0046] (3) Clean the PTFE container with deionized water for 10 minutes, clean the PTFE container with acetone for 10 minutes, clean the PTFE container with isopropanol for 10 minutes, clean the PTFE container with deionized water for 10 minutes, and then dry it with a nitrogen gun;

[0047] (4) Take 10mL of the filtered perovskite solution and place it in a PTFE container, place it on a heating pl...

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Abstract

The invention discloses a preparation method of perovskite single crystals. The preparation method comprises the following steps: taking and mixing first halide and second halide, stirring and dissolving with a polar solvent, and preparing a perovskite solution, wherein the mass ratio of the first halide to the second halide to the polar solvent requires that the perovskite solution is supersaturated; performing filtering treatment on the perovskite solution; putting the perovskite solution after filtering treatment in a hydrophobic container, heating and separating out the perovskite single crystals. In the preparation method disclosed by the invention, a hydrophobic material is selected as a growth container for the perovskite single crystals; due to the hydrophobicity of the wall of the hydrophobic container, the number of crystal nucleus growing on the wall of the hydrophobic container is sharply reduced, the number of the crystals grown is relatively reduced, the grown crystals are larger within unit time, the quantity of broken crystals is reduced, the utilization rate of the solution is improved, and the crystal quality is significantly improved.

Description

technical field [0001] The invention belongs to the field of photoelectric materials and single crystal preparation, and more specifically relates to a method for preparing a perovskite single crystal. Background technique [0002] In recent years, new perovskite materials have shown great application value in the fields of photovoltaics, luminescence, lasers, and photoelectric detection, and have become one of the hotspots in international material research. [0003] When the particles inside the crystal are arranged regularly and periodically in the three-dimensional space, or the whole crystal is composed of the same spatial lattice in the three-dimensional direction, and the particle in the whole crystal is arranged in a long-range order in space, it can be called this. The crystals are single crystals. [0004] Compared with polycrystalline perovskite films, perovskite single crystals exhibit better thermal stability, wider light absorption range, lower hole concentrat...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B7/14
CPCC30B7/14C30B29/12
Inventor 唐江罗家俊潘伟程巫皓迪蔡粉莎
Owner HUAZHONG UNIV OF SCI & TECH
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