Sr-Pb binary metal composite perovskite material, and preparation and application method thereof

A composite perovskite and binary metal technology, which is applied in the fields of electrical components, semiconductor/solid-state device manufacturing, organic semiconductor devices, etc., can solve the environmental friendliness of perovskite batteries and other issues

Inactive Publication Date: 2015-11-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a perovskite material with low lead content and its preparation method, as well as its application method in the field of solar cells, on the basis of maintaining the photoelectric conversion efficiency of the cell, to solve the environmental friendly problem of the existing perovskite cell

Method used

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  • Sr-Pb binary metal composite perovskite material, and preparation and application method thereof
  • Sr-Pb binary metal composite perovskite material, and preparation and application method thereof
  • Sr-Pb binary metal composite perovskite material, and preparation and application method thereof

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Experimental program
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Effect test

Embodiment 1

[0070] Embodiment 1, comprises the steps:

[0071] (1) PbI with a molar ratio of 50% 2 with 50% molar ratio of SrCl 2 The powders are homogeneously mixed to form PbI 2 and SrCl 2 mixed powder;

[0072] (2) the PbI 2 and SrCl 2 Mix powder, with CH 3 NH 3 I crystals are proportioned in a molar ratio of 1:1 to form a mixture;

[0073] (3) Dissolving the mixture in N,N-dimethylformamide DMF solvent, stirring at 70°C until completely dissolved to obtain a Sr-Pb binary metal composite perovskite material; wherein, the mixture The mass ratio of the total mass of the material is 40%.

Embodiment 2

[0074] Embodiment 2, comprises the steps:

[0075] (1) PbCl with a molar ratio of 70% 2 with 30% molar ratio of SrI 2 The powders are homogeneously mixed to form PbCl 2 and SrI 2 mixed powder;

[0076] (2) the PbCl 2 and SrI 2 Mix powder, with CH 3 NH 3 Br crystals are mixed in a molar ratio of 1:2 to form a mixture;

[0077] (3) Dissolving the mixture in a gamma-butyrolactone solvent, stirring at 100°C until completely dissolved to obtain a Sr-Pb binary metal composite perovskite material; wherein, the mixture accounts for 1% of the total mass of the material The mass ratio is 50%.

Embodiment 3

[0078] Embodiment 3, comprises the steps:

[0079] (1) PbBr with a molar ratio of 90% 2 with 10% molar ratio of SrI 2 The powders are homogeneously mixed to form PbBr 2 and SrI 2 mixed powder;

[0080] (2) the PbBr 2 and SrI 2 Mix powder, with CH 3 NH 3 Cl crystals are mixed in a molar ratio of 1:1 to form a mixture;

[0081] (3) Dissolving the mixture in dimethyl sulfoxide DMSO solvent, stirring at 120° C. until completely dissolved to obtain a Sr-Pb binary metal composite perovskite material; wherein, the mixture accounts for the total mass of the material The mass ratio is 60%.

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Abstract

The invention discloses a novel binary metal composite perovskite material and a preparation method thereof, and also an application method of the novel binary metal composite perovskite material to preparation of perovskite solar cells with various structures. The material is prepared from halogenated methylamine, lead halide, strontium halide and a solvent. Compared with conventional CH3NH3PbI3 perovskite materials, the material has the advantages that the content of lead ions is reduced, environment protection is facilitated, and a good basis is laid for large-scale commercialization of perovskite solar cells.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, and relates to a Sr-Pb binary metal composite perovskite material and its preparation and application in heterojunction solar cells, which is conducive to reducing the amount of Pb in perovskite cells, thereby Mitigate the environmental hazards caused by large-scale commercialization of this type of battery. Background technique [0002] A solar cell is a device that converts light energy into electrical energy; the existing commercial solar cells are either crystalline silicon solar cells or various thin-film solar cells, because their high cost is not conducive to large-scale application. From 2009 Japanese scientist Miyasaka reported liquid perovskite CH 3 NH 3 PB 3 The efficiency of solar cells is 3.8%, and the efficiency of 20.1% was certified by South Korea Soek in 2015. The exponential development of perovskite solar cell performance has aroused great interest in the scie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K30/10H10K2102/00Y02E10/549
Inventor 陈炜王欢张文君曾宪伟
Owner HUAZHONG UNIV OF SCI & TECH
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