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

A double perovskite, lead-free indium-based technology, applied in the directions of luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve the problems of inefficiency, large-scale preparation, complicated preparation method and process, and achieve mild preparation conditions. Controllable, simple and flexible operation, high product purity

Active Publication Date: 2022-07-12
SHENZHEN UNIV
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  • 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, preparation method and application thereof
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  • Lead-free indium-based double perovskite material, preparation method and application thereof

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preparation example Construction

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

[0030] S01. Provide a first solution containing a first metal halide salt and a second solution containing a second metal halide salt, wherein the first metal of the first metal halide salt is selected from Na or K, 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. The first solution, the second solution and the third solution are mixed and reacted to obtain a first mixed solution, and the first mixed solution is separated and purified to obtain a lead-free indium-based double perovskite material.

[0033] The first aspect of the present application provides a method for preparing a lead-free indium-based double perovskite material. The method comprises a f...

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 includes 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 The first solution containing NaCl, 4mmol CsCl is dissolved in 1mL ultrapure water water to obtain a molar concentration of 4mol / L containing the second solution of CsCl;

[0079] Supplied with InCl 3 The third solution, and adjust the pH of the third solution 3 Dissolve in 1 mL of ultrapure water, and dropwise add 50 μL of concentrated hydrochloric acid to adjust the pH of the third solution <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, and after they were fully reacted, the...

Embodiment 2

[0082] The preparation method of Sb-doped lead-free indium-based double perovskite material includes 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 The first solution containing NaCl, 4mmol CsCl is dissolved in 1mL ultrapure water water to obtain a molar concentration of 4mol / L containing the second solution of CsCl;

[0084] Supplied 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 dropwise add 50 μL of concentrated hydrochloric acid to adjust the pH of the third solution <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, and after they were fully reacted, they were centrifuged, washed twice with isopropanol, and then...

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Abstract

The present application 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. Wherein, the preparation method of lead-free indium-based double perovskite material includes the following steps: providing a first solution containing a first halide metal salt and a second solution containing a second halide metal salt, and providing a third solution containing indium halide , and adjust the pH of the third solution to <4.0; 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 the lead-free indium-based double perovskite material. The preparation method has simple and flexible operation, mild and controllable preparation conditions, zero waste discharge, no pollution, excellent environmental performance, and is suitable for large-scale production of lead-free indium-based double perovskite materials with non-toxic, high stability and high purity. Scale and stable production.

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 a preparation method and application thereof. Background technique [0002] Single-matrix white LED materials are one of the most in-demand materials in LEDs. Lead halide semiconductor materials with perovskite crystal structure have been widely studied due to their good luminescent properties and electronic properties. Although the material can have excellent optoelectronic properties, the lead element in the material has strong toxicity, which is easy to cause serious impact on the environment and organisms; at the same time, the inherent instability of the material is strong, which makes the lead-free perovskite Mineral materials have been continuously researched. [0003] At present, some non-lead perovskite materials have been reported, indium-based perovskite materials have received extensi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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