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Preparation method of photo anode of dye-sensitized solar cell with optical gradient

A technology for solar cells and dye sensitization, applied in the field of photoanode manufacturing of dye-sensitized solar cells, can solve problems such as corrosion of conductive glass, and achieve the effects of reducing compounding, preventing corrosion and improving photocurrent

Inactive Publication Date: 2010-08-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this method is that TiCl 4 As a substance that is easily hydrolyzed, it has a certain corrosion on conductive glass, and releases acidic substances after heat treatment.

Method used

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  • Preparation method of photo anode of dye-sensitized solar cell with optical gradient
  • Preparation method of photo anode of dye-sensitized solar cell with optical gradient
  • Preparation method of photo anode of dye-sensitized solar cell with optical gradient

Examples

Experimental program
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Effect test

Embodiment 1

[0031] After the 1M titanium sulfate solution was heated to 60°C, 4M sodium hydroxide solution was added dropwise, neutralized until the pH value was approximately equal to 7, and a white precipitate was obtained, which was washed repeatedly with distilled water to obtain a gel-like solid. Take 80 grams of wet precipitate (containing about 12 grams of titanium dioxide) and disperse it in 100 milliliters of 30% hydrogen peroxide, and degumming at 60° C. for 2 hours to obtain a light yellow transparent solution. Take 10 ml of the transparent solution, dilute it to 40 ml, add it to a hydrothermal kettle, and take it out after 120°C hydrothermal treatment for 12 hours to form a transparent sol. Get the powder that 20 milliliters of sol vacuum drying obtains and carry out XRD analysis, X-ray diffraction (XRD) result shows that titanium dioxide wherein is anatase phase, as figure 1 As shown, it can be seen as a pure anatase phase with a grain size of 7-8 nm. Prepare 50 ml of titan...

Embodiment 2

[0033] After heating the 1M titanium sulfate solution to 60°C, add 4M ammonia solution dropwise to the 1M titanium sulfate solution, and neutralize until the pH value is approximately equal to 7 to obtain a white precipitate, which is washed repeatedly with distilled water to obtain a gel-like solid. Take the wet precipitate 80 grams (converted into titanium dioxide is 12 grams) is dispersed in 300 milliliters of 30% hydrogen peroxide, degummed at 60 ℃ for 1 hour, obtains light yellow transparent solution, gets this transparent solution 20 milliliters, dilutes to 40 milliliters, adds to Hydrothermal kettle, 180 degrees hydrothermal treatment for 12 hours, take out to form a transparent sol. Prepare 50 milliliters of titanium dioxide sol with a concentration of 1 wt%, place it in a 100 milliliter glass beaker, and set aside. After cleaning the FTO conductive glass, soak it in the titanium dioxide sol for 30 minutes, then take it out and dry it at room temperature for 30 minutes...

Embodiment 3

[0035] After heating the 0.85M titanium sulfate solution to 70°C, add 4M sodium hydroxide solution dropwise to the 0.85M titanium sulfate solution, neutralize until the pH value is approximately equal to 7, and obtain a white precipitate, which is washed repeatedly with distilled water to obtain a gel-like solid , get 80 grams of wet precipitation (converted into titanium dioxide to be 12 grams) and disperse it in 200 milliliters of 30% hydrogen peroxide, obtain light yellow transparent solution, get this transparent solution 30 milliliters, dilute to 70 milliliters, join in hydrothermal kettle, After 24 hours of hydrothermal treatment at 150 degrees, it was taken out to form a transparent sol. Prepare 50 ml of titanium dioxide sol with a concentration of 2wt%, place it in a 100 ml glass beaker, and set aside. After cleaning the ITO conductive glass, soak it in the titanium dioxide sol for 50 minutes, then take it out and dry it in an oven for 30 minutes at 80°C. After impreg...

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Abstract

The invention relates to a preparation method of photo anode of dye-sensitized solar cell with optical gradient, comprising the following steps: (1), adding sodium hydroxide or ammonia water into the inorganic titanium slat used as the precursor to generate the precipitation, washing the precipitation with water to acquire solid in the gel manner, peptizing the same to prepare the pale yellow transparent solution, diluting the prepared solution, and performing hydro-thermal process on the same so as to prepare the transparent TiO2 solution of anatase phase; (2), depositing a TiO2 compact layer on a conductive substrate by spin-coating, dipping / coating or casting method; (3), depositing a layer of porous TiO2 film on the TiO2 compact layer by screen printing, blade coating method or spray coating method; and (4), calcining the film with two structure so as to form the photo anode with optical gradient. In the invention, the colloidal sol for preparing the transparent compact layer does not contain any organic matter and other impurities; the high temperature sintering is not required; the blocking layer formed between the conductive layer and the porous film blocks the corrosion of electrolyte on the substrate; and the preparation method has excellent application foreground.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cell photoanode manufacture, and in particular relates to a preparation method of a dye-sensitized solar cell photoanode with an optical gradient. Background technique [0002] year 1991, prepared a new type of solar cell similar to the principle of plant photosynthesis, called dye-sensitized nanocrystalline solar cells (DSSCs). Due to its low cost, simple preparation process, and high photoelectric conversion efficiency, researchers have paid extensive attention to low-cost photovoltaic cells. [0003] Dye-sensitized solar cells are mainly composed of conductive glass, porous nano-titanium oxide film adsorbing monolayer dye, platinum-coated conductive glass and electrolyte. Different from traditional silicon-based solar cells, dye-sensitized solar cells convert light energy into electrical energy by virtue of the strong absorption of light by dyes, and the absorption and transport of electr...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/48
CPCH01G9/2059Y02E10/542H01G9/2031
Inventor 张青红钱迪峰王宏志李耀刚万钧
Owner DONGHUA UNIV
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