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Molecular Engineering of New Thienyl-Bodipy Dyes for Highly Efficient Panchromatic Sensitized Solar Cells




Stepwise construction of thienyl-bodipy dyes bearing a carboxylic acid or an acrylate function is realized. The color of the dye is tuned by the presence of one or two vinyl-thienyl arms. These highly colored dyes exhibit strong absorption spanning to 760 nm when anchored to TiO2 nanoparticles. The use of two complementary absorbing dyes produces a conversion efficiency of 6.43% and a incident photon-to-current conversion efficiency (ICPE) plateau of about 70% between 500 and 700 nm.