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Method for preparing bifunctional DSSC (dye-sensitized solar cell) photo-anode

A technology of solar cells and dye sensitization, which is applied in the field of preparation of photoanodes of dual-functional dye-sensitized solar cells, can solve the problems of decreased ability to adsorb dyes, failure to fully utilize, small specific surface area of ​​large particles, etc. The effect of large diameter, increased photoelectric conversion efficiency, and large specific surface area

Inactive Publication Date: 2012-01-18
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light scattering property of the photoanode is poor, and a lot of light directly passes through the photoanode, which cannot be fully utilized, so there is still a large room for improvement.
S. Kang et al. (see S. Kang, J. Kim, H. Kim, H. Koh, J. Lee, Y. Sung, Journal of Photochemistry & Photobiology, A: Chemistry, 200 (2008) 294-300.) in The photoanode is mixed with large particles with light scattering ability, which effectively increases the comprehensive utilization of light, but the specific surface area of ​​the large particles is small, which reduces the ability of the entire photoanode to absorb dyes.
Z. Wang et al. (see Z. Wang, H. Kawauchi, T. Kashima, H. Arakawa, Coordination Chemistry Reviews, 248 (2004) 1381-1389.) studied the blending of different grades of titanium dioxide particles and the preparation of multilayer films to enhance light The light scattering ability of the anode effectively improves the conversion efficiency of the battery, but the light scattering particles used are still large particles with a small specific surface area, which also reduces the adsorption of dyes

Method used

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  • Method for preparing bifunctional DSSC (dye-sensitized solar cell) photo-anode
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  • Method for preparing bifunctional DSSC (dye-sensitized solar cell) photo-anode

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Experimental program
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Effect test

Embodiment 1

[0017] Example 1 Preparation of Titanium Dioxide Microspheres of Different Shapes with Different Ammonia Concentrations

[0018] Titanium dioxide microspheres were prepared by hydrolysis-solvothermal method: 0.1 mol / L (mol / liter) KCl aqueous solution was added dropwise to absolute ethanol to make the KCl concentration 4×10 -5 mol / L. Tetrabutyl titanate was added dropwise to the solution, stirred for half an hour, a precipitate formed, and stood for a week. Collect the sediment at the bottom, wash and dry it, and then put it into a hot water ax filled with ammonia, water and ethanol solutions. The mass concentration of ammonia is 28%, and the volume ratios of ammonia, water and ethanol are 0:1:2, 0.05: 1:2, 0.1:1:2, keep warm at 160°C for 16 hours. Collect, wash, and dry at 80°C to obtain titanium dioxide microspheres prepared under three different concentrations of ammonia water.

[0019] The morphology of titanium dioxide microspheres prepared under different ammonia conce...

Embodiment 2

[0020] Example 2 Preparation of bifunctional photoanode and assembly into battery

[0021] Hydrothermal synthesis of nanocrystalline TiO2 slurries (see S. Ito, T. Murakami, P. Comte, P. Liska, C. Gr tzel, M. Nazeeruddin, M. Gr tzel, Thin Solid Films, 516 (2008) 4613- 4619.), coated it on the conductive film (FTO), and annealed at 450-550 ° C for 1 hour to prepare a nanocrystalline titanium dioxide porous film.

[0022] Titanium dioxide microspheres were prepared by hydrolysis-solvothermal method: 0.1 mol / L (mol / liter) KCl aqueous solution was added dropwise to absolute ethanol to make the KCl concentration 4×10 -5 mol / L. Tetrabutyl titanate was added dropwise to the solution, stirred for half an hour, a precipitate formed, and stood for a week. Collect the bottom precipitate, wash and dry it, put it into a hydrothermal ax filled with ammonia water, water and ethanol solution, the volume ratio of ammonia water, water and ethanol is 0.05:1:2, and keep it warm at 160°C for 16 h...

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Abstract

The invention discloses a method for preparing a bifunctional DSSC (dye-sensitized solar cell) photo-anode. A photo-anode with a TiO2 nanocrystalline / TiO2 microsphere bilayer structure is prepared through coating a layer of TiO2 microsphere film with a high specific surface area on a TiO2 nanocrystalline film. By using the method disclosed by the invention, the dye absorption quantity of a DSSC can be obviously improved, and the light scattering performance of the DSSC can be increased, thereby better utilizing the sun light, and greatly improving the photoelectric conversion efficiency. By using the method disclosed by the invention, two effects of high dye absorption and strong light scattering are achieved simultaneously; and the method is simple in process and good in repeatability, and has a good application prospect.

Description

technical field [0001] The invention relates to a method for preparing a double-functional dye-sensitized solar cell photoanode, which belongs to the field of photovoltaic materials and devices. Background technique [0002] Dye-sensitized solar cells have attracted widespread attention because of their simple fabrication process and low cost. The dye adsorbed on the photoanode of the dye-sensitized solar cell can generate photo-generated electrons under the excitation of photons. The larger the specific surface area of ​​the photo-anode, the more dyes can be adsorbed, which is more conducive to generating more photo-generated electrons, and can also improve The short-circuit current and photoelectric conversion efficiency of the battery. In addition, if the photoanode has a certain light scattering ability, it can effectively increase the optical path of light in the battery photoanode, increase the chance of exciting the dye, and is also conducive to the improvement of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/20H01M14/00H01L51/48
CPCY02E10/542Y02E10/549
Inventor 赵兴中孙小华刘钰旻陈博磊彭涛彭天右
Owner WUHAN UNIV
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