The effects of the introduction of alkylsilyl groups to porphyrin dyes on their sensitizing property in dye-sensitized solar cells were investigated by using a newly synthesized tetraphenylporphyrincarboxylic acid containing trimethylsilyl groups. The cell with the porphyrin showed higher photovoltaic performance than that with a tert-butyl-containing analog, and the zinc complex of the porphyrin exhibited remarkably high sensitizing performance comparable to N3 dye.
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