The Effect of Anchoring Group of Dyes on Performance of Dye-Sensitized Solar Cells

Three new organic days have been synthesized with phenothiazine as the electron donor group and cyanoacrylic acid, thioxothiazolidin and tetrazole as the electron acceptor anchoring group. The proposed dyes were sensitized from phenothiazine as the starting material by standard reactions and characterized by different techniques such as melting point, FT-IR, 1HNMR, elemental analysis and UV-Visible spectroscopy after purification. Spectrophotometric measurements of the synthesized dyes in solution and on a TiO2 substrate were carried out in order to assess changes in the status of the dyes. The wavelengths of maximum absorption for synthesized dyes in solution are 415 nm, 432 nm and 448 nm and on TiO2 films are 440 nm, 456 nm and 471 nm, respectively. Finally, the proposed dyes used as a sensitizer in a dye solar cell structure and their photovoltaic properties investigated. The Conversion efficiencies for organic dyes are 3.15%, 5.29% and 5.79%, respectively.