Chemical synthesis method for environment-friendly inorganic lead-free halide perovskite thin film

A halide perovskite, chemical synthesis technology, applied in photovoltaic power generation, electrical components, electric solid devices, etc., can solve the problems of Pb pollution, unstable organic matter, etc., achieve low equipment requirements, low cost, and solve unstable performance Effect

Inactive Publication Date: 2017-02-01
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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Problems solved by technology

[0004] The purpose of the present invention is to provide a chemical synthesis method of an environment-friendly inorganic non-lead halide perovskite film, which mainly solves the problems of organic matter instability and Pb pollution in the existing organic-inorganic metal compound perovskite

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  • Chemical synthesis method for environment-friendly inorganic lead-free halide perovskite thin film
  • Chemical synthesis method for environment-friendly inorganic lead-free halide perovskite thin film
  • Chemical synthesis method for environment-friendly inorganic lead-free halide perovskite thin film

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Embodiment

[0029] The invention provides a kind of inorganic non-lead halide (chemical formula is CsSnX 3 or Cs 2 wxya 6 , X is one or more of the halogen elements Cl, Br or I) perovskite thin films, which are mainly used in perovskite batteries. Such as figure 1 As shown, the process of preparing this kind of inorganic non-lead halide perovskite film is as follows:

[0030] 1. CsSnX 3 / Cs 2 wxya 6 Synthesis of Inorganic Non-Lead Halide Perovskite Precursor Solutions

[0031] (1) SnX 2 Dissolve in an organic solvent, and magnetically stir until completely dissolved, with a solubility of 0.1-5mol / L; the organic solvent is preferably DMF, DMSO, ether or isopropanol;

[0032] (2) Add CsX to mix (CsX and SnX 2 The molar mass ratio is 1-2:1), and stirred at 50-100°C and protected from light for 2-24 hours to obtain CsSnX 3 / Cs 2 wxya 6 Inorganic non-lead halide perovskite precursor solution;

[0033] The above-mentioned CsSnX 3 / Cs 2 wxya 6 The synthesis process of the inorgan...

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Abstract

The invention discloses a chemical synthesis method for an environment-friendly inorganic lead-free halide perovskite thin film. The chemical synthesis method comprises the steps of (1) dissolving SnX<2> into an organic solvent, and performing magnetic stirring until the SnX<2> is fully dissolved; (2) adding CsX and stirring in a light-shading condition to obtain a CsSnX<3>/Cs<2>SnX<6> inorganic lead-free halide perovskite precursor solution; (3) performing ultrasonic cleaning on a substrate material, and drying by nitrogen; (4) putting the substrate material into an ultraviolet ozone cleaner to be subjected to radiation treatment; (5) paving the CsSnX<3>/Cs<2>SnX<6> inorganic lead-free halide perovskite precursor solution on the bottom surface of the substrate material, and performing spin coating; and (6) heating the material and performing thermal insulation for a certain time, and cooling to room temperature to obtain the CsSnX<3>/Cs<2>SnX<6> inorganic lead-free halide perovskite thin film. The CsSnX<3>/Cs<2>SnX<6> inorganic lead-free halide perovskite thin film prepared by the chemical synthesis method is high in stability, low in cost, low in equipment requirement, green, environment-friendly and pollution-free, and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of photovoltaic cells, in particular to a chemical synthesis method of an environment-friendly inorganic non-lead halide perovskite thin film. Background technique [0002] Halide-based perovskite has the characteristics of excellent light absorption ability, considerable ambipolar carrier mobility, and ultra-long electron-hole diffusion length, and it has gradually become one of the most important research hotspots in the field of photovoltaics today. one. The main organo-inorganic metal compound of the current halide perovskites is methylamine lead iodide (CH 3 NH 3 wxya 3 , X is one or more of Cl / Br / I), the main synthetic component of methylamine lead iodide is methylamine halide (CH 3 NH 3 X) It is easily hydrolyzed when exposed to water, resulting in extremely unstable performance of methylamine lead iodine perovskite, and methylamine lead iodine perovskite contains toxic Pb element, so this also l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/44H01L51/46
CPCH10K30/00H10K30/80Y02E10/549
Inventor 杨盼杨丽军赵晓冲王劲川杨蕊竹
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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