AbstractPorous TiO2 films with both mesoporosity and macroporosity were fabricated by a templated sol-gel method. With incorporation of differently sized pores, the resulted structure is featured of high surface area and an aligned pore network, which are believed to be beneficial for fast charge transportation in electrolytes. The measured specific surface area and porosity of synthesized films were in range of 33-137m2/g and 61-80 percent, respectively, depending on the size of selected template. Compared to the nanocrystalline films widely applied in current dye-sensitized solar cells (DSC), the reported structure has additional feature facilitating electrolyte diffusion and provides possible approaches towards efficient all-solid-state or quasi-solid-state junctions.
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