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Lead-free indium-based double perovskite material and preparation method and application thereof

A double perovskite, lead-free indium-based technology, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve the problems of complex preparation methods, inefficiency, large-scale preparation, etc., and achieve simple and flexible operation. , the preparation conditions are mild and controllable, and the effect of high purity

Active Publication Date: 2021-02-12
SHENZHEN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a lead-free indium-based double perovskite material and its preparation method and application, aiming to solve the problem that the preparation method of the lead-free indium-based double perovskite material in the prior art has a complicated process and cannot be efficiently and mass-produced. preparation problem

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  • Lead-free indium-based double perovskite material and preparation method and application thereof
  • Lead-free indium-based double perovskite material and preparation method and application thereof
  • Lead-free indium-based double perovskite material and preparation method and application thereof

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preparation example Construction

[0029] The first aspect of the embodiment of the present application provides a method for preparing a lead-free indium-based double perovskite material, including the following steps:

[0030] S01. providing the first solution containing the first metal halide salt and the second solution containing the second metal halide salt, wherein the first metal of the first metal halide salt is selected from Na or K, and the second metal halide salt of the second metal halide The metal is selected from Cs or Rb;

[0031] S02. Provide a third solution containing indium halide, and adjust the pH of the third solution to <4.0;

[0032] S03. Mix the first solution, the second solution and the third solution for reaction to obtain a first mixed solution, and separate and purify the first mixed solution to obtain a lead-free indium-based double perovskite material.

[0033] The preparation method of the lead-free indium-based double perovskite material provided in the first aspect of the p...

Embodiment 1

[0076] A kind of lead-free indium-based double perovskite material and preparation method thereof

[0077] The preparation method of lead-free indium-based double perovskite material comprises the following steps:

[0078] Provide the first solution containing NaCl and the second solution containing CsCl, wherein 6mmol NaCl is dissolved in 1mL ultrapure water to obtain a molar concentration of 6mol / L containing the first solution of NaCl, 4mmol CsCl is dissolved in 1mL ultrapure water Water, the molar concentration that obtains is the second solution that 4mol / L contains CsCl;

[0079] Provided with InCl 3 The third solution, and adjust the pH of the third solution 3 Dissolve in 1 mL of ultrapure water, and add 50 μL of concentrated hydrochloric acid dropwise to adjust the pH of the third solution to <4.0 to obtain the third solution;

[0080] The second solution and the third solution were injected into the first solution at a volume ratio of 1:1, centrifuged after they wer...

Embodiment 2

[0082] The preparation method of the Sb-doped lead-free indium-based double perovskite material comprises the following steps:

[0083] Provide the first solution containing NaCl and the second solution containing CsCl, wherein 6mmol NaCl is dissolved in 1mL ultrapure water to obtain a molar concentration of 6mol / L containing the first solution of NaCl, 4mmol CsCl is dissolved in 1mL ultrapure water Water, the molar concentration that obtains is the second solution that 4mol / L contains CsCl;

[0084] Provided with InCl 3 and SbCl 3 The third solution, and adjust the pH of the third solution 3 and 0.02mmol SbCl 3 Dissolve in 1 mL of ultrapure water, and add 50 μL of concentrated hydrochloric acid dropwise to adjust the pH of the third solution to <4.0 to obtain the third solution;

[0085] The second solution and the third solution were injected into the first solution at a volume ratio of 1:1, centrifuged after they were fully reacted, washed twice with isopropanol, and the...

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Abstract

The invention relates to the technical field of perovskite materials, and provides a lead-free indium-based double perovskite material and a preparation method and application thereof. The preparationmethod of the lead-free indium-based double perovskite material comprises the following steps: providing a first solution containing a first halogenated metal salt and a second solution containing asecond halogenated metal salt, providing a third solution containing indium halide, and adjusting the pH value of the third solution to be less than 4.0, mixing the first solution, the second solutionand the third solution for reaction to obtain a first mixed solution, and separating and purifying the first mixed solution to obtain the lead-free indium-based double perovskite material. The preparation method is simple and flexible to operate, mild and controllable in preparation condition, capable of achieving zero emission of waste, free of pollution, excellent in environmental protection performance and suitable for large-scale stable production of the lead-free indium-based double perovskite material which is non-toxic, high in stability and high in purity.

Description

technical field [0001] The application belongs to the technical field of perovskite materials, and in particular relates to a lead-free indium-based double perovskite material and its preparation method and application. Background technique [0002] Single-matrix white LED materials are one of the most demanded materials in LEDs. Lead halide semiconductor materials with perovskite crystal structure, which have been studied more, have attracted extensive attention due to their good luminescent properties and electronic properties. Although the material can have excellent photoelectric performance, the lead element in the material is highly toxic, and it is easy to cause serious impact on the environment and organisms; at the same time, the inherent instability of the material makes the lead-free perovskite Mineral materials have been continuously researched. [0003] At present, some lead-free perovskite materials have been reported, and indium-based perovskite materials ha...

Claims

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Application Information

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IPC IPC(8): C09K11/62
CPCC09K11/628C09K11/756Y02B20/00Y02E10/549
Inventor 时玉萌刘泽向周勃李贺楠
Owner SHENZHEN UNIV
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