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J. Phys. IV France 132 (2006) 359-363
Bilayer electrode composition of TiO2 film for dye-sensitized solar cellM. Murayama1, 2, E. Yamazaki1, N. Hashimoto1 and T. Mori2
1 Mie Science and Technology Center, Industrial division,Takachaya, Tsu, Mie, Japan
2 Department of Electrical Engineering and Computer Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
Nano-porous TiO2 film as a photoelectrode plays an important role in dye-sensitized solar cell. The TiO2 film is generally prepared from precursor paste including TiO2 nano particles by heating. Additives in the precursor paste and "bilayer" compositions of TiO2 films were studied. The reflectance of TiO2 film prepared from nitric-acid added paste was higher than that from acetylacetone-added paste over visible light region. Energy conversion efficiency of cell using the former film as single layer electrode is low. However, in the case of bilayer, electrode consisting of film prepared from nitric-acid added paste on the substrate side showed much increase of efficiency compared with acetylacetone-added film. It is considered that nitric acid improves the electric contact of TiO2 layers.
© EDP Sciences 2006