Enhanced Electron Transport through Template-Derived Pore Channels in Dye-Sensitized Solar Cells

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• 作者：Sarika Phadke ; Aurelien Du Pasquier ; Dunbar P. Birnie ; III
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：September 22, 2011
• 年：2011
• 卷：115
• 期：37
• 页码：18342-18347
• 全文大小：862K
• 年卷期：v.115,no.37(September 22, 2011)
• ISSN：1932-7455

文摘

Dye-sensitized solar cells use porous nanoparticle TiO₂ coating as their photoanode. To obtain effective dye adsorption and better electrolyte permeation in the TiO₂ coating, the porosity structure must be fully, three-dimensionally interconnected. Templated processing offers the advantage of preparing TiO₂ photoanodes in controlled shape and interconnection to the porosity structures that result, including the creation of dual size scale porosity in some cases. In the present work, an emulsion templating method was employed to obtain the dual porosity in the titania coating. We have studied the effect of the enhanced permeation of the electrolyte provided by these interconnected pore channels using electrochemical impedance spectroscopy. The change in internal resistances of the dye-sensitized solar cell during operation is correlated with the microstructural features using scanning electron microscopy, mercury porosimetry and I鈥?i>V characterization.