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Titania mesoporous ball, preparation and use in solar cell

A solar cell and titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of cumbersome process, high cost, and difficult to preserve the pore structure completely

Inactive Publication Date: 2009-06-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of the above two methods are that the template method is used for synthesis, resulting in high cost and cumbersome process, and it is difficult to completely preserve the pore structure during the heat treatment template removal process.

Method used

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  • Titania mesoporous ball, preparation and use in solar cell
  • Titania mesoporous ball, preparation and use in solar cell
  • Titania mesoporous ball, preparation and use in solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Dissolve 2.63 g of boric acid in 100 ml of deionized water, dissolve 0.01 mole of n-butyl titanate in 25.5 ml of n-butanol solvent, and slowly add n-butyl titanate in n-butanol dropwise without any stirring In boric acid aqueous solution, after standing still for 48 hours, a white precipitate was obtained. The white precipitate was washed several times with deionized water and absolute ethanol, dried at 60°C, and sintered at 450°C for 3 hours to obtain titanium dioxide mesoporous spheres (such as figure 1 As shown, it is anatase phase, the diameter of mesoporous spheres is 50-200nm, and the specific surface area is 138m 2 / g, average pore diameter 9.5nm). Put 2.40 grams of P25 nano-titanium oxide in a mortar, add 0.8 milliliters of ethanol solution with a volume ratio of 10% acetylacetone, grind for 0.5 hours, add 3.2 milliliters of deionized water and 0.04 milliliters of Triton-100, and continue milling for 0.5 hours to form Sol. The sol was printed on conductive gl...

Embodiment 2

[0019] The steps are the same as in Example 1, except that the quality of the boric acid is 5.26 grams, and the standing time becomes 60 hours. After the white precipitate is dried, it is sintered at 400° C. for 4 hours to obtain titanium dioxide mesoporous spheres (such as figure 2 As shown, the anatase phase, mesoporous sphere diameter 100 ~ 200nm, specific surface area 153m 2 / g, average pore diameter 8.3nm); the composite film was dried under natural conditions for 24 hours, and heat-treated at 450°C for 40 minutes. The photoelectric conversion efficiency of the obtained solar cell device is (9% ± 0.5%), such as image 3 shown.

Embodiment 3

[0021] The steps are the same as in Example 1, except that the mass of boric acid is 5.26 grams, 0.01 mole of n-butyl titanate is dissolved in 25.5 milliliters of cyclohexanol, and the standing time is 24 hours. The white precipitate is dried at 80° C. Sintering at ℃ for 5 hours to obtain titanium dioxide mesoporous spheres (anatase phase, mesoporous sphere diameter 150-300nm, specific surface area 178m 2 / g, average pore size 6.7nm); 1.00 gram of P25 nano-titanium oxide was placed in a mortar, 0.3 milliliters of acetylacetone in ethanol was added, and 1.0 milliliters of deionized water and 0.01 milliliters of Triton-100 were added after grinding for 0.5 hours. The film was prepared by printing the sol on conductive glass by spin coating method, and heat-treated at 500°C for 0.25 hours; the composite film was dried under natural conditions for 48 hours, and heat-treated at 400°C for 2 hours. The concentration of dye solution is 8×10 -4 mol / L, soaking time is 24 hours. The ph...

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Abstract

The invention relates to a method for preparing titania mesoporous spheres and application of the titania mesoporous spheres in a solar cell. The titania mesoporous spheres can be used for making membrane electrodes for use in a photo-cathode of a dye-sensitized solar cell, and the photo-cathode comprises a first layer of transparent titania membrane and a second layer of the titania mesoporous sphere membrane of the invention, wherein the first layer of transparent titania membrane is obtained through heat treatment of titania sol which is obtained by grinding and is screen-printed on a conductive substrate, and the second layer of titania mesoporous sphere membrane is formed by printing sol prepared from titania mesoporous spheres through screen printing and other techniques. The dye-sensitized solar cell made on the basis of the titania mesoporous spheres is simple in preparation method, has a electrode membrane which can fully absorbing dye and has excellent light dispersion performance, and contributes to the improvement of the photoelectric conversion rate.

Description

technical field [0001] The invention belongs to the technical field of solar cell manufacturing, and relates to a method for preparing titanium oxide mesoporous spheres, which is designed and applied to titanium oxide composite thin film photoanode materials to develop dye-sensitive materials with high photoelectric conversion efficiency. chemical solar cells. Background technique [0002] Dye-sensitized solar cells are attracting increasing attention due to their excellent properties such as low pollution, no energy consumption, sustainability, and low cost, and are expected to replace expensive silicon-based solar cells for commercial applications in the near future. [0003] The dye-sensitized titanium dioxide solar cell unit is a structure similar to a "sandwich". The nano-titanium dioxide electrode is the key to the entire solar cell, which determines the adsorption of dyes and the transmission of electrons, and ultimately affects the photoelectric conversion efficiency...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 邵玮顾锋李春忠
Owner EAST CHINA UNIV OF SCI & TECH
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