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Perovskite single crystal and preparation method and application thereof

A perovskite and single crystal technology, applied in the field of perovskite single crystal and its preparation, can solve the problems of affecting crystal growth, many crystal surface defects, negative impact of single crystal application, etc., to avoid water and oxygen contact, preparation method simple effect

Active Publication Date: 2021-07-13
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since divalent tin is in an unstable chemical state, it is easily oxidized to tetravalent tin in aqueous solution, which affects crystal growth, and the surface of the crystal affected by oxidation has many defects, which has a negative impact on subsequent single crystal applications.

Method used

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  • Perovskite single crystal and preparation method and application thereof
  • Perovskite single crystal and preparation method and application thereof
  • Perovskite single crystal and preparation method and application thereof

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preparation example Construction

[0045] In addition, the applicant in this application also provides a simple and efficient preparation method, including:

[0046] 1) dissolving tin source, thiocyanate ion source and organic hydroiodide in an organic solvent to obtain a precursor solution,

[0047]2) cooling the precursor liquid to crystallize to obtain the perovskite single crystal.

[0048] Specifically, the tin source is tin diiodide.

[0049] Described organic solvent is one or more in alcohols, ethers, acetonitrile or pyridine, preferably, described organic solvent is alcohols, according to the characteristic of each alcohol in alcohols, the solubility when dissolving changes to some extent, For example, the alcohols may be one or more of methanol, ethanol, isopropanol, ethylene glycol, propylene glycol, glycerol, isobutanol, pentanol, hexanol or n-butanol. More preferably, the organic solvent is one or more of isopropanol, ethylene glycol, propylene glycol and glycerol.

[0050] According to the abov...

Embodiment 1

[0057] A kind of n-butylamine tin iodine (BA) is provided in the present embodiment 2 SnI 4 A method for preparing a two-dimensional perovskite single crystal, the specific steps are:

[0058] Weigh 74.5mg (0.2mmol) of tin diiodide, 80.4mg (0.4mmol) of n-butylamine hydroiodide, and 30.45mg (0.40mmol) of ammonium thiocyanate in a 4ml sample bottle, add 1.0ml of isopropanol to heat It was fully dissolved at 60°C. Let it stand for natural cooling to cool down and make it crystallize and precipitate. After 12 hours, the precipitation was complete, and the XRD pattern was as follows figure 1 shown.

Embodiment 2

[0060] A kind of isobutylamine tin iodine (IBA) is provided in the present embodiment 2 SnI 4 A method for preparing a two-dimensional perovskite single crystal, the specific steps are:

[0061] Weigh 74.5mg (0.2mmol) of tin diiodide, 80.4mg (0.4mmol) of isobutylamine hydroiodide, and 30.45mg (0.40mmol) of ammonium thiocyanate in a 4ml sample bottle, add 1.0ml of isopropanol to heat It was fully dissolved at 60°C. Let stand to cool down and allow the crystals to precipitate. After 12 hours, the precipitation was complete, and the XRD pattern was as follows figure 1 shown.

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Abstract

The invention provides a perovskite single crystal and a preparation method and application thereof. The chemical formula of the perovskite single crystal is A2SnI4, wherein A is selected from one of n-butylamino, isobutylamino, 2-phenylethylamino, 2-fluorophenylethylamino, 3-fluorophenylethylamino and 4-fluorophenylethylamino. The low-dimensional tin-based perovskite single crystal prepared by the invention can be used for a photoelectric detector and shows obvious distinguishing on polarized light.

Description

technical field [0001] The invention relates to the field of single crystal preparation, in particular to a perovskite single crystal and its preparation method and application. Background technique [0002] As a new generation of optoelectronic materials, organic-inorganic hybrid halide perovskites have attracted extensive attention of researchers due to their high carrier mobility, long carrier diffusion length and large light absorption coefficient. These materials are widely used in solar cells, light-emitting diodes, photodetectors, catalysis and other fields. [0003] At present, the certified efficiency of lead-based perovskite solar cells has exceeded 24%, but the toxicity of lead hinders its commercial development. Environmentally friendly tin-based perovskite batteries have attracted extensive attention as lead-based alternatives. Compared with polycrystalline thin films, perovskite single crystals have lower defect density and grain boundaries, and thus, have be...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C211/07C07C211/27C07C211/29C30B29/54C30B7/14H01L51/46
CPCC07C209/00C30B29/54C30B7/14C07B2200/13H10K85/60C07C211/07C07C211/27C07C211/29Y02E10/549
Inventor 宁志军韩聪聪姜显园
Owner SHANGHAI TECH UNIV
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