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Preparing method of methyl amino bismuth iodide photovoltaic film

A technology of methylamino and photovoltaic thin films, applied in photosensitive equipment, etc., can solve problems such as human body and environmental hazards, achieve the effects of controllable thickness, meet the use requirements, and good light absorption performance

Inactive Publication Date: 2015-07-01
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lead is a toxic element, and excessive use is very harmful to the human body and the environment.

Method used

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  • Preparing method of methyl amino bismuth iodide photovoltaic film
  • Preparing method of methyl amino bismuth iodide photovoltaic film
  • Preparing method of methyl amino bismuth iodide photovoltaic film

Examples

Experimental program
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Effect test

Embodiment 1

[0024] a. Methylamine and hydroiodic acid are mixed at a ratio of 1:1.2, reacted in a low temperature environment of -10°C for 2 hours, then heated up to 50°C to evaporate to obtain a powder, and then use absolute ethanol to heat and dissolve the powder at a temperature of 30°C , then lower the temperature to -30°C to precipitate methylammonium iodide, repeat the operation twice, purify methylammonium iodine, and finally heat and evaporate at a temperature of 50°C, dry to obtain methylammonium iodine powder, collect it for use;

[0025] B, the methylamine iodine powder obtained in step a is dissolved in the organic solvent as dimethylformamide, stirred at room temperature, configured into a methylamine iodine solution with a concentration of 0.3mol / L, and placed in a beaker;

[0026] c, add bismuth iodide in the methylamine iodine solution obtained in step b at a molar ratio of 3:1, configure a solution with a concentration of 0.1mol / L, heat and stir to make the solution clear;...

Embodiment 2

[0030] a. Methylamine and hydroiodic acid are mixed at a molar ratio of 1:1.5, reacted in a low temperature environment of -5°C for 1 hour, and then evaporated at 60°C to obtain a powder, and then use absolute ethanol to heat and dissolve the powder, The temperature is 50°C, then the temperature is lowered to -10°C to precipitate methylamine iodine, and the operation is repeated twice to purify methylammonium iodine, and finally heated and evaporated at a temperature of 60°C, dried to obtain methylammonium iodine powder, which is collected for use;

[0031] B, dissolving the methylamine iodine powder obtained in step a in the organic solvent being gamma-butyrolactone, stirring at room temperature, configuring a concentration of methylamine iodine solution of 0.8mol / L, and placing it in a beaker;

[0032] c, bismuth iodide is added in the methylamine iodine solution obtained in step b at a molar ratio of 2:1, configured into a solution with a concentration of 0.4mol / L, heated an...

Embodiment 3

[0036] a. Methylamine and hydroiodic acid are mixed at a molar ratio of 1:1, reacted at a low temperature of 0°C for 2 hours, and then evaporated at 70°C to obtain a powder, and then use absolute ethanol to heat and dissolve the powder, the temperature 65°C, then lower the temperature to -10°C to precipitate methylammonium iodine, repeat the operation twice, purify methylammonium iodide, and finally heat and evaporate at a temperature of 70°C, dry to obtain methylammonium iodine powder, collect it for use;

[0037] B, the methylamine iodine powder obtained in step a is dissolved in the organic solvent as dimethylformamide, stirred at room temperature, configured into a methylamine iodine solution with a concentration of 1.0mol / L, and placed in a beaker;

[0038] C, bismuth iodide is added in the methylamine iodine solution gained in the step b by molar ratio 2.5:1, is configured into the solution of concentration 0.4mol / L, heats and stirs, makes solution clarification;

[0039...

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Abstract

The invention relates to a preparing method of methyl amino bismuth iodide photovoltaic film. The method includes: mixing methylamine and hydroiodic acid, allowing reaction at low temperature, performing evaporating and drying to obtain methylamine iodine powder, dissolving the methylamine iodine powder and bismuth iodide powder in dimethyl formamide or V-butyrolactone solution, performing heating and stirring to allow dissolution, subjecting a substrate to spin-coating, and performing heating and crystallizing at set temperature so as to obtain the methyl amino bismuth iodide film. The method has the advantages of simplicity in process, low cost, good environment friendliness, ease of large-scale production and the like. The methyl amino bismuth iodide prepared by the method has bandgaps in a visible light area, I-V curve testing of a solar cell device prepared shows that photoelectric conversion performance is good, and the method is applicable to the field of solar cell photovoltaics.

Description

technical field [0001] The invention belongs to the field of material preparation and relates to a method for preparing a methylamino bismuth iodide photovoltaic thin film. The methylamino bismuth iodide photovoltaic thin film obtained by the method of the invention exhibits good photovoltaic characteristics. Background technique [0002] Energy issues have always been a global issue. With the reduction of oil and coal resources, the energy crisis has emerged again. The application of photovoltaic technology brings hope to alleviate energy problems. [0003] After fuel-sensitized solar cells, organic-inorganic hybrid perovskite solar cells have become a new research hotspot, and the photoelectric efficiency has shown rapid development in the past two years. The basic structural formula of organic-inorganic hybrid perovskite materials is ABX 3 , where the A position is aliphatic or aromatic, the B position is a divalent metal cation, and the X position is a halide ion. Mos...

Claims

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Application Information

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IPC IPC(8): H01G9/20
Inventor 徐金宝王贺勇王磊边亮任卫
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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