Spirobifluorene-Bridged Donor/Acceptor Dye for Organic Dye-Sensitized Solar Cells.

A new dye, SSD1, featuring two donor/acceptor chromophores aligned in a spiro configuration with two anchoring groups separated at a distance of 10.05 Å (closely matching the distance between the adsorption sites of the anatase TiO2surface) undergoes efficient dye adherence on TiO2films. A dye-sensitized solar cell incorporating SSD1exhibited a short-circuit current of 8.9 mA cm−2, an open-circuit voltage of 0.63 V, a fill factor of 0.67, and a power conversion efficiency of 3.75%. [ABSTRACT FROM AUTHOR]