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Organic-inorganic hybrid metal halide perovskite compound, preparation method and application

A metal halide and compound technology, applied in the field of luminescent materials, can solve problems such as few types of materials, material instability, lead element toxicity, etc., and achieve the effects of avoiding toxicity problems, simple preparation method and good reproducibility

Active Publication Date: 2022-07-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In summary, the organic-inorganic hybrid low-dimensional metal halide luminescent materials currently prepared have the following problems: (1) the toxicity of lead elements; (2) the instability of materials; (3) materials that emit broad-spectrum warm white light fewer types

Method used

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  • Organic-inorganic hybrid metal halide perovskite compound, preparation method and application

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Experimental program
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Embodiment 1

[0045] According to the ratio of methylamine hydrochloride and indium trichloride 2:1-6:1, respectively weigh 2-6mmol methylamine hydrochloride and 1mmol indium trichloride, then add 5-10mL anhydrous methanol to mix Stir evenly, place the open glass bottle containing the mixed solution in a large beaker containing 50-100 mL of anhydrous ether, then seal the beaker with a sealing film, and leave it at room temperature for 12-24 hours to obtain a rod-shaped single crystalline product. refer to figure 1 , single crystal XRD analysis and its chemical formula is: A 4 InCl 7 , where A=CH 3 NH 3 + .

Embodiment 2

[0047] According to the ratio of aniline hydrochloride and indium trichloride 2:1-6:1, weigh 2-6mmol of aniline hydrochloride and 1mmol of indium trichloride respectively, then add 5-10mL of anhydrous methanol and mix well , place the open glass bottle containing the mixed solution in a large beaker containing 50-100mL of anhydrous ether, then seal the mouth of the beaker with a sealing film, and place it at room temperature for 12-24 hours to obtain a rod-shaped single crystal product. refer to figure 2 , single crystal XRD analysis and its chemical formula is: A' 6 InCl 9 , where A'=C 6 H 5 NH 3 + .

Embodiment 3

[0049] According to the ratio of tetraethylammonium chloride and indium trichloride 2:1-6:1, weigh 2-6mmol of tetraethylammonium chloride and 1mmol of indium trichloride respectively, and then add 5-10mL of anhydrous Methanol was mixed and stirred evenly, and the open glass bottle containing the mixed solution was placed in a large beaker containing 50-100 mL of anhydrous ether, and then the beaker was sealed with a sealing film, and placed at room temperature for 12-24 hours, A rod-shaped single crystal product was obtained. refer to image 3 , single crystal XRD analysis and its chemical formula is: A" 2 InCl 5 , where A”=C 4 H 12 N + .

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Abstract

The invention provides an organic-inorganic hybrid zero-dimensional metal halide perovskite luminescent compound, and a preparation method and application thereof. The chemical formula of the compound is A4InnSb1-nX7, A '6InnSb1-nX9 or A' 2InnSb1-nX5, A = CH3NH3 + or CH3CH2NH3 +, A '= C6H5NH3 + or C6H5CH2NH3 +, A' = C4H12N + or C8H20N +, X = Cl, Br or I, and n is larger than or equal to 0 and smaller than or equal to 1. The compound has a zero-dimensional halide perovskite crystal structure, and the crystal structure unit is composed of isolated metal halide polyhedrons and organic amine cations. The compound is prepared by adopting organic amine salt and metal halide inorganic salt as raw materials and then adopting an anti-solvent diffusion method. The compound has wide spectrum emission, high fluorescence quantum efficiency, warm yellow color temperature and high chemical stability in a visible light range, and can be applied to solid-phase luminescence, illumination, display and X-ray scintillators.

Description

technical field [0001] The invention relates to the field of light-emitting materials, in particular to an organic-inorganic hybrid metal halide perovskite compound, a preparation method and an application. Background technique [0002] In recent years, metal halide perovskites have been studied due to their unique optoelectronic properties, such as easily tunable band gap, tunable emission wavelength, high absorption coefficient, low defect density, long carrier lifetime, and high carrier mobility. It has been widely used in optoelectronic fields such as solar cells, light-emitting diodes and X-ray detectors. Its general chemical formula can be used ABX 3 to represent that the A-position cation is generally a smaller +1-valent organic ammonium ion (methylamine MA + , formamidine FA + ) or alkali metal ions (Li + , Na + , K + , Rb + , Cs + ), B bit is Pb 2+ , Sn 2+ , Ge 2+ Equivalent high valence cation, X-position anion is mainly halogen ion Cl - , Br - , I - ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/04C07C211/46C07C211/63C07C209/68C09K11/06
CPCC07C211/04C07C211/46C07C211/63C09K11/06C09K2211/1007Y02E10/549
Inventor 黄瀚林乔硕彦于岩
Owner FUZHOU UNIV