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Method for preparing sheet-shaped bismuth oxyiodide (BiOI) nano-film electrode

A bismuth iodide and nano-film technology is applied in the field of preparation of sheet-like bismuth iodide nano-film electrodes, which can solve the problems of lowering battery efficiency, affecting performance, increasing cost and the like, and achieving uniform distribution, stable product quality, and low energy consumption. Effect

Inactive Publication Date: 2010-10-13
HUAZHONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of hydrothermal and solvothermal requires high temperature, high energy consumption, resulting in increased cost, while the microemulsion method will introduce organic impurities in the reaction, even if it is cleaned, there will be some residues, which will affect the final performance, and the use of viscous The contact agent directly affects the electron transfer and reduces the efficiency of the battery

Method used

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  • Method for preparing sheet-shaped bismuth oxyiodide (BiOI) nano-film electrode
  • Method for preparing sheet-shaped bismuth oxyiodide (BiOI) nano-film electrode
  • Method for preparing sheet-shaped bismuth oxyiodide (BiOI) nano-film electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Wash the conductive glass sheet with isopropanol and ethanol and dry it, put it in a 0.1 mol / liter titanium tetrachloride aqueous solution at 50°C for 1 hour, make a titanium dioxide barrier layer on the surface of the conductive glass sheet, take it out and wash it; Bismuth nitrate is added to water to prepare a bismuth ion solution with a concentration of 1 mmol / L; potassium iodide is added to water to obtain an iodide ion solution with a concentration of 1 mmol / L; the conductive glass sheet with a titanium dioxide barrier layer is immersed in the above-mentioned In the two solutions, rinse the residual liquid with water after each immersion, repeat the process 15 times, and obtain a sheet-shaped bismuth oxyiodide nano-film electrode after washing and drying.

[0016] Thin-film electrodes and conductive glass sputtered with platinum are packaged to form a solar cell, and the electrolyte is injected into the electrolyte. The electrolyte solvent is 3-methoxypropionitrile...

Embodiment 2

[0018] Wash the conductive glass sheet with isopropanol and ethanol and dry it, put it in a 0.1 mol / liter titanium tetrachloride aqueous solution at 50°C for 1 hour, make a titanium dioxide barrier layer on the surface of the conductive glass sheet, take it out and wash it; Bismuth nitrate is added to water to prepare a bismuth ion solution with a concentration of 2 mmol / L; potassium iodide is added to water to obtain an iodide ion solution with a concentration of 2 mmol / L; the conductive glass sheet with a titanium dioxide barrier layer is immersed in the above-mentioned In the two solutions, rinse the residual liquid with water after each immersion, repeat the process 30 times, and obtain the sheet-shaped bismuth oxyiodide nano-film electrode after washing and drying.

[0019] The method for measuring the parameters of the obtained thin film solar cell effect is the same as in Example 1, and the results are shown in Table 1.

[0020] Example 3

[0021] Wash the conductive g...

Embodiment 4

[0024] Wash the conductive glass sheet with isopropanol and ethanol and dry it, put it in a 0.1 mol / liter titanium tetrachloride aqueous solution at 50°C for 1 hour, make a titanium dioxide barrier layer on the surface of the conductive glass sheet, take it out and wash it; Bismuth nitrate is added to water to prepare a bismuth ion solution with a concentration of 5 mmol / L; potassium iodide is added to water to obtain an iodide ion solution with a concentration of 5 mmol / L; the conductive glass sheet with a titanium dioxide barrier layer is immersed in the above-mentioned In the two solutions, rinse the residual liquid with water after each immersion, repeat the process 60 times, and obtain the flake-shaped bismuth oxyiodide nano-film electrode after washing and drying.

[0025] The method for measuring the parameters of the obtained thin film solar cell effect is the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention provides a method for preparing a sheet-shaped bismuth oxyiodide (BiOI) nano-film electrode, and belongs to the technical field of film preparation. The method comprises the following steps of: dissolving a bismuth compound in water to obtain solution of bismuth ions; dissolving an iodide in the water to obtain solution of iodide ions; immersing a conductive glass which is plated with a titanium dioxide blocking layer into the two solution sequentially, washing the conductive glass with water after reaction; and then repeating the process for 15 to 90 times, washing the conductive glass with the water and drying the conductive glass to obtain the sheet-shaped BiOI nano-film electrode. The preparation method is simple; the prepared bismuthyl iodide crystals are distributed on the conductive glass uniformly; and the product can be used for producing a solar battery.

Description

technical field [0001] The invention relates to a method for preparing a sheet-shaped bismuth oxyiodide nanometer film electrode, which belongs to the technical field of film preparation. Background technique [0002] Since the discovery of the photovoltaic effect, researchers have been working hard to invent a device that converts light energy directly into electricity, which can capture energy from the inexhaustible sunlight and generate clean electricity for human use. We generally call it a solar cell. The principle of solar cells is that photons fall on the semiconductor to generate electron and hole pairs, resulting in the formation of a potential difference at the interface (p-n junction) of two different types of materials (ie, n-type and p-type). The region flows to the n region, the holes move in the opposite direction, and the current is generated when the circuit is connected. The solar energy received by the earth every day is equivalent to hundreds of times o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/34
Inventor 张礼知王克伟贾法龙
Owner HUAZHONG NORMAL UNIV
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