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Preparation method of high-quality large-size organic-inorganic hybrid perovskite single crystals

A perovskite, high-quality technology, applied in the fields of materials and chemical synthesis, can solve the problems of poor single crystal quality, strict equipment requirements, and difficulty in increasing the size of single crystals, and achieve the effect of good stability.

Inactive Publication Date: 2018-11-06
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN106283195A introduces the preparation of organic-inorganic hybrid perovskite single crystal by inversion crystallization method. Although the single crystal growth period is short, there are defects such as poor quality of the single crystal
"Science 2015, 347, 967" and "Nature Photon. 2016, 10, 333-339" introduced the top seed method and the anti-solvent vapor assisted crystallization method to prepare organic-inorganic hybrid perovskite single crystals, but both have their own processes Strict requirements on equipment and difficult to enlarge single crystal size

Method used

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  • Preparation method of high-quality large-size organic-inorganic hybrid perovskite single crystals

Examples

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Effect test

example 1

[0027] Example 1: Take by weighing 1.86g methyl iodide (CH 3 NH 3 I) with 5.46g lead iodide (PbI 2 ), dissolved in 9.6ml of GBL, sealed and stirred at 60°C for 12 hours to obtain a perovskite single crystal growth solution; after filtering the perovskite single crystal growth solution, take 5ml into a glass bottle, seal it and place it at 100°C Insulation in the oven, while using a 150lx halogen light source to irradiate the growth solution. After 12 hours, a single crystal was obtained, and the single crystal was taken out, rinsed with isopropanol and dried, and stored in a dry place away from light.

example 2

[0028] Example 2: Take by weighing 0.35g chloromethylamine (CH 3 NH 3 Cl) with 1.41g lead chloride (PbCl 2 ), dissolved in 5ml of dimethyl sulfoxide (DMSO) and chlorobenzene (CN), sealed and stirred at room temperature for 12 hours to obtain a perovskite solution; after filtering the perovskite single crystal growth solution, take 5ml and place it in a glass bottle, sealed and placed in an oven at 60°C to keep warm, and at the same time irradiate the growth solution with a 500 lx white light source. After 12 hours, a single crystal was obtained, and the single crystal was taken out, rinsed with acetonitrile and dried, and stored in a dry place protected from light.

example 3

[0029] Example 3: Take by weighing 0.75g methyl bromide (CH 3 NH 3 Br) with 2.22g lead bromide (PbBr 2 ), dissolved in 6ml of N,N-dimethylformamide (DMF), sealed and stirred at room temperature for 12 hours to obtain a perovskite solution; filter the perovskite single crystal growth solution and take 5ml into a glass bottle , sealed and placed in an oven at 70°C to keep warm, and at the same time irradiate the growth solution with 800lx light source A. After 12 hours, a single crystal was obtained, and the single crystal was taken out, rinsed and dried with a mixed solution of isobutanol and isopropanol, and stored in a dry place away from light.

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Abstract

The invention discloses a preparation method of high-quality large-size organic-inorganic hybrid perovskite single crystals. By the method, high-quality perovskite single crystals can be obtained, meanwhile, the preparation method is environmentally friendly and pollution-free, and has low requirements for the environment, and the utilization rate of a solution is greatly increased. According to the method, metal halide and organic halide are mixed and dissolved in a solvent, a temperature-inversion crystallization process is adopted, a photoinduction technology is introduced for the first time, and multiple types of high-quality large-size organic-inorganic hybrid perovskite single crystals are prepared successfully. The method plays an important role in scientific research and large-scale production of organic-inorganic hybrid perovskite devices.

Description

technical field [0001] The invention and the field of materials and chemical synthesis. More specifically, it relates to a large-size, high-quality organic-inorganic perovskite single crystal preparation method. Background technique [0002] Organic-inorganic hybrid halide perovskites have flourished in recent years. Due to its high absorption coefficient, adjustable direct bandgap, low exciton binding energy, long charge carrier diffusion length and lifetime, it has made great achievements in solar cells, light-emitting diodes, lasers, photodetectors and other fields. Wide range of applications, especially the photoelectric conversion efficiency (PCE) of organic-inorganic hybrid perovskite solar cells has reached 22.7%, reaching the level of industrial application. However, the stability of perovskite devices and the development of new devices require in-depth exploration and research on the physical properties of their single crystals. Moreover, compared with perovskite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/54C30B7/14C30B30/00
CPCC30B7/14C30B29/54C30B30/00
Inventor 王世伟毕欢李伟
Owner CHANGCHUN UNIV OF TECH