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Bismuth-based perovskite material and preparation method thereof

A perovskite material, bismuth-based technology, used in organic chemistry methods, semiconductor/solid-state device manufacturing, photovoltaic power generation, etc., can solve problems such as poor material stability, hinder commercial development, and pollute the environment, and achieve good thermal stability. Rich reserves and good repeatability

Inactive Publication Date: 2020-06-16
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lead is toxic, which not only causes harm to the human body, but also seriously pollutes the environment, and the material's poor stability hampers its commercial development

Method used

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  • Bismuth-based perovskite material and preparation method thereof
  • Bismuth-based perovskite material and preparation method thereof
  • Bismuth-based perovskite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] 0.6436g (2mmol) BiCl 3 , 0.5248g (2mmol) methyl viologen, 0.836mL (10mmol) hydrogen chloride, and 8mL methanol were added to the polytetrafluoroethylene reactor, stirred at room temperature for 30 minutes, and then the polytetrafluoroethylene reactor was sealed and placed in a constant temperature oven In 130°C, the temperature was kept at 130°C for 60 hours. After the reaction, the temperature was slowly lowered at room temperature. The single crystal was precipitated from methanol, and washed several times with methanol ultrasonically to obtain a yellow bismuth-based perovskite material (denoted as (MV)BiCl 5 ), its chemical formula is (C 12 h 14 N 2 )BiCl 5 , where C 12 h 14 N 2 Represents the positive divalent methyl viologen cation. Single crystal X-ray diffraction analysis of the material revealed that (MV)BiCl 5 P2 crystallized in the monoclinic system 1 / c space group, the unit cell parameters are α=90°, β=100.833°, γ=90°, unit cell volume Depend on...

Embodiment 2

[0030] 0.4707g (1mmol) Bi 2 o 3 , 0.3134g (2mmol) 4,4'-bipyridine, 2.20mL (15mmol) hydrogen bromide, and 4mL methanol were added to the polytetrafluoroethylene reactor, stirred at room temperature for 1 hour, and then the polytetrafluoroethylene reactor was sealed Afterwards, put it in a constant temperature oven, and keep it warm at 160°C for 50 hours. After the reaction, slowly lower the temperature at room temperature, the single crystal is precipitated from methanol, and washed with methanol ultrasonically to obtain a red bismuth-based perovskite material (denoted as (MV ) BiBr 5 ), its chemical formula is (C 12 h 14 N 2 ) BiBr 5 , where C 12 h 14 N 2 Represents the positive divalent methyl viologen cation. Single crystal X-ray diffraction analysis of the material revealed that (MV)BiBr 5 The compound crystallizes in the monoclinic P2 1 / c space group, the unit cell parameters are α=90°, β=100.66°, γ=90°, unit cell volume Depend on image 3 Visible, (MV)BiB...

Embodiment 3

[0032] 0.4707g (1mmol) Bi 2 o 3 , 0.3134g (2mmol) 4,4'-bipyridine, 0.933mL (8mmol) hydrogen iodide, 6mL methanol were added to the polytetrafluoroethylene reactor, stirred at room temperature for 2 hours, and then the polytetrafluoroethylene reactor was sealed Afterwards, put it into a constant temperature oven, and keep it warm at 170°C for 40 hours. After the reaction, slowly lower the temperature at room temperature, the single crystal is precipitated from methanol, and washed with methanol ultrasonic to obtain a black bismuth-based perovskite material (denoted as (MV ) BiI 5 ), its chemical formula is (C 12 h 14 N 2 ) BiI 5 , where C 12 h 14 N 2 Represents the positive divalent methyl viologen cation. Single crystal X-ray diffraction analysis of this material revealed that (MV)BiI 5 The compound crystallizes in the monoclinic P2 1 The space group, the unit cell parameters are α=90°, β=101.962°, γ=90°, unit cell volume Depend on Figure 4 Visible, (MV)BiI 5 T...

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Abstract

The invention discloses a bismuth-based perovskite material and a preparation method thereof. The chemical formula of the material is (C12H14N2) BiX5, wherein C12H14N2 represents a positive bivalent methyl viologen cation, and X represents any one or more of Cl, Br and I. The material is prepared by carrying out solvothermal reaction in a methanol solution by taking a bismuth source and haloid acid as raw materials and 4, 4'-dipyridyl or methyl viologen as a structure directing agent. The preparation method disclosed by the invention is simple and convenient to operate and good in repeatability, the photoelectric property of the material can be effectively regulated and controlled by changing halogen, and meanwhile, the metal element bismuth is used for replacing a toxic element lead, so that harm to a human body and pollution to the environment are reduced. The material disclosed by the invention is good in wet and thermal stability, excellent in photoelectric property and good in semiconductor property, and has a wide application prospect in the fields of solar cells, photoelectric materials, photoelectric detection, photo-catalysis / photo-electro-catalysis and the like.

Description

technical field [0001] The invention belongs to the technical field of photoelectric materials, and relates to a bismuth-based perovskite material and a preparation method thereof. Background technique [0002] Since the report, halide perovskite solar cells have become a promising semiconductor material due to their excellent optoelectronic properties. The perovskite material itself has high carrier mobility, large extinction coefficient, and low defect density. Since Kojima and others first used perovskite materials as the light-absorbing layer of solar cells in 2009, this type of material has excellent performance in the fields of solar cells, lasers, photodetection, photocatalysis, photoelectrocatalysis, and water sensing. At present, most perovskite materials are mainly lead (Pb)-based perovskite materials. Among them, the lead-based organometallic halide perovskite APbX 3 (X=I,Br,Cl) is proven to be an efficient perovskite material for solar cells, where A represent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/22H01L51/46H01L51/48
CPCC07D213/22C07B2200/13H10K85/654H10K30/10Y02E10/549
Inventor 高子伟王艳艳刘媛媛文锐
Owner SHAANXI NORMAL UNIV
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