Journal article

Free-base tetraarylphthalocyanines for dye-sensitized nanostructured solar cell applications

Adsorption of phthalocyanines lacking conventional attaching substituents onto nanostructured TiO2 electrodes has been studied, and some of the important factors for sensitization have been identified. Tetradimethoxyphenyl phthalocyanine (2) and tetra-Ph phthalocyanine (3), derived from 4-(2,5-dimethoxyphenyl)phthalonitrile and 4-phenylphthalonitrile, resp., successfully sensitize nanostructured TiO2 electrodes, with IPCEmax of 9 and 5% at λ = 650 nm. The dye-oxide systems have been characterized by UV-vis spectroscopy, cyclic voltammetry and photoelectrochem. methods, and the dye-surface interactions are discussed.


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