Porous TiO2 Films Prepared by Sol-Gel Process for Dye-sensitized Solar Cell Applications

• Main Authors: Kai-Han Chuang, 莊凱寒
• Other Authors: Chung-Kwei Lin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/01273661931801596534

碩士 === 逢甲大學 === 材料科學所 === 95 === Porous TiO2 were synthesized via a sol-gel process in this research. The research mainly concerns with the technique of the processing parameters of porous TiO2 electrodes of Dye-sensitized solar cells, including the process of TiO2 preparation, screen printing coated electrode, the optimized temperature of sintering coating process, and the property after dye absorption and after sintering, measuring the effect of photoconversion efficiency on die-sensitized solar cell after packing. The research mainly concerns with the sol-gel process and P-25 powder with average radius of the particles smaller than 30 mm. By SEM analysis, X-ray analysis, particle size analysis and thermogravimetry analysis, discussing the differences. Screen printing is used in the coating process to coat thick films on ITO glass, by adding organic solution and dispersant to condensed sol-gel and P-25 powder, producing prosperous thick liquid for coating on ITO glass. Screen printing is beneficial for manufacturing on commercial. Thick films after coating is sintered for vanishing organic solvent, and discuss the thermal gravity, crystal phase transformation and the effect of PS particles on promoting the total efficiency and photo conversion efficiency of the battery. The addition of PS sphere to the coating surface can raise the efficiency of the Dye-sensitized solar cell from the resule of the research. From further modification to the best parameter of the research, the addition of secondary element silver, and surface activation (ion bomberment) can raise the efficiency small amount of the increment of the efficiency mole by the addition of the secondary element, while using ion bombenent for the activation of the coating surface can have more increase against the efficiency.