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Dimension reduction method of three-dimensional perovskite

A perovskite, three-dimensional technology, applied in chemical instruments and methods, lead compounds, inorganic chemistry, etc., can solve problems such as slow cooling, material morphology, size, and chemical composition difficulties, crystallization method dependence, etc.

Inactive Publication Date: 2021-11-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for dimensionality reduction of three-dimensional perovskite, aiming at solving the problem that the traditional crystallization method relies on the slow cooling of hot concentrated solution or the rapid evaporation of solvent, which makes it possible to control the shape of the material at the nanometer scale. Difficult problems of appearance, size and chemical composition

Method used

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Examples

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Embodiment 1

[0027] S1: Put 2.5ml oleic acid, 30ml octadecene and 0.814g cesium carbonate into a 100ml three-necked bottle A;

[0028] S2: vacuumize the three-necked bottle A containing the mixture of oleic acid, octadecene and cesium carbonate for 1 hour;

[0029] S3: keeping the mixture of oleic acid, octadecene and cesium carbonate at 150°C under nitrogen atmosphere for 3 hours until the mixture of oleic acid, octadecene and cesium carbonate forms a clear precursor solution;

[0030] S4: Put 0.138g of lead bromide, 0.069g of magnesium bromide, 1ml of oleylamine, 1ml of oleic acid and 10ml of octadecene into a 100ml three-necked bottle B;

[0031] S5: Vacuum the three-necked bottle B, heat the mixture of lead bromide, magnesium bromide, oleylamine, oleic acid and octadecene to 120°C under vacuum, and keep this state for 1 hour to obtain a mixed solution A;

[0032] S6: Rapidly heat up the mixed solution A at 120°C to 185°C, and inject 1ml of the precursor solution into it to obtain the...

Embodiment 2

[0035] Using the same process as in Example 1, the difference is that the amount of magnesium bromide in step 2 of Example 1 is changed to 0.104g, and other conditions remain the same.

Embodiment 3

[0037] Using the same process as in Example 1, the difference is that the amount of magnesium bromide in step 2 of Example 1 is changed to 0.138g, and other conditions remain the same.

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Abstract

The invention is suitable for the technical field of semiconductors, and provides a dimension reduction method of three-dimensional perovskite, wherein the method comprises the following steps: S1, preparation of a precursor solution: putting a certain amount of octadecene, oleic acid and cesium carbonate into a three-necked bottle A, and then heating the mixture in the three-necked bottle A in an inert gas atmosphere to obtain a clear liquid; S2, adding lead bromide, magnesium bromide, oleic acid and oleylamine into a three-necked bottle B filled with octadecene, then carrying out air extracting on the three-necked bottle B, and heating a mixture in the three-necked bottle B in the inert gas atmosphere to obtain a mixed solution A; and S3, injecting a precursor solution into the mixed solution A for heating to obtain a mixed solution B, and performing ice-water bath on the mixed solution B to obtain dimension-reduced perovskite. According to the method, a thermal injection synthesis method is utilized, the colloid synthesis dynamic process is regulated and controlled through the metal ion surface, the efficient quasi-two-dimensional perovskite is prepared, and the dimension reduction engineering of the three-dimensional perovskite is realized.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and in particular relates to a dimensionality reduction method of a three-dimensional perovskite. Background technique [0002] Metal halide perovskites have become one of the research hotspots in recent years due to their tunable chemical composition and crystal structure, as well as the corresponding tunable physical and optoelectronic properties. By introducing appropriate chemical components into the perovskite structure , according to the spatial ordering and connection of metal halide octahedral units, metal halide perovskites are classified into three-dimensional, two-dimensional, one-dimensional and zero-dimensional perovskites. [0003] The traditional synthesis method of quasi-two-dimensional perovskite is very limited. Basically, the method of preparing perovskite body material by liquid phase crystallization and the method of spin-coating to prepare perovskite film can realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/00
Inventor 白雪胡强高旭鹏武振楠张宇陆敏于伟泳
Owner JILIN UNIV
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