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High-quality two-dimensional layered lead iodide perovskite single-crystal material and production method thereof

A two-dimensional layered, single-crystal material technology, applied in the growth of polycrystalline materials, chemical instruments and methods, single crystal growth, etc., can solve grain boundary defects, limited application of two-dimensional lead iodide perovskite materials, etc. problems, to achieve high stability, commercialization, and simple preparation methods

Inactive Publication Date: 2019-06-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2014, two-dimensional perovskite materials have attracted great interest from many researchers, but most of the current research is based on two-dimensional lead iodide perovskite thin-film materials, and polycrystalline thin-film materials inevitably have grain boundary defects. , there is a large defect density, which leads to the limited application of two-dimensional lead iodide perovskite materials

Method used

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  • High-quality two-dimensional layered lead iodide perovskite single-crystal material and production method thereof
  • High-quality two-dimensional layered lead iodide perovskite single-crystal material and production method thereof
  • High-quality two-dimensional layered lead iodide perovskite single-crystal material and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1RNH 3 I's preparation.

specific example

[0024] Will RNH 3 Dissolve in water or ethanol solution, add the equivalent amount of HI to the mixed solution dropwise, react in an ice water bath for 3 hours to obtain a colorless solution, remove the solvent with a vacuum rotary evaporator to obtain a white crude product, and then use Ethanol and ether were recrystallized to obtain a white solid. Specific examples are as follows:

[0025] a) CH 3 NH 3 Preparation of I: In an ice water bath, dissolve methylamine in the aqueous solution, add the equivalent amount of hydroiodic acid dropwise to the mixed solution, react for three hours, remove the solvent, and obtain a white crude product, crude product The pair was recrystallized with a mixed solvent of ethanol and ether, filtered, and dried in vacuum to obtain a white solid with a yield of 86.3%. The product was confirmed by nuclear magnetism.

[0026] 1 H NMR (400MHz, DMSO) δ 7.58 (s, 3H), 2.84-2.71 (m, 2H), 1.50 (dd, J = 14.3, 7.1 Hz, 2H), 1.25 (s, 18H), 0.86 (t, J=6.7Hz, 3H)...

Embodiment 2

[0029] Inorganic layer n=1 single crystal (n-C 16 H 25 NH 3 ) 2 PbI 4 Preparation: Add n-C 16 H 25 NH 3 I and PbI 2 Dissolve it in a mixed solvent of acetone and nitromethane at a molar ratio of 2:1, stir to dissolve, and slowly volatilize at room temperature for about 12 days to obtain yellow transparent crystals.

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Abstract

The invention discloses a two-dimensional layered lead iodide perovskite single-crystal material and production and application thereof. The two-dimensional layered lead iodide perovskite single-crystal material is of a natural quantum well structure, and has dielectricity of organic materials and conductivity of inorganic materials, and by adjusting components of the material, controllable adjustment of the width and the energy levels of multiple quantum wells can be achieved. The two-dimensional layered lead iodide perovskite single-crystal material produced through a method has the characters of being high in quality, large in size and high in phase purity, meanwhile, production operation is simple, the cost is low, and large-batch production can be achieved, so that the two-dimensionallayered lead iodide perovskite single-crystal material has important application prospects in the fields of solar cells, light emitting diodes, photonic crystals, photoelectric detectors and the like.

Description

Technical field [0001] The invention relates to a high-quality two-dimensional layered lead iodide perovskite single crystal material and a preparation method thereof. The material can be used as a photonic crystal material, a light emitting diode material, a field effect transistor material, and a solar battery material. Background technique [0002] At present, lead iodide perovskite material is an emerging semiconductor material, which combines all the advantages of organic and inorganic materials. The dielectric properties of organic materials and the conductivity of inorganic materials make it a natural quantum well structure. Because the two-dimensional layered perovskite material has a natural multiple quantum well structure, it is used in field effect transistors (Science, 1999, 286(5441): 945-947.), light-emitting diodes (Nature Photonics, 2017, 11(2) :108-115.), photodetectors (Angew.Chem.Int.Ed.2017,56,12150-12154.), solar cells (Nature 2016,536(7616):312-316) have im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/06C30B29/54C30B29/64
Inventor 陈殷江静
Owner CENT SOUTH UNIV
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