Relationship Between I3 − Diffusion in Titania Nanopores Modified with Dyes and Open Circuit Voltage of Dye-Sensitized Solar Cell

Relative diffusion rates (Rrel) of I3 − species in titania nanopores modified with various dye molecules were measured. Introduction of polar atoms such as O or F decreased Rrel and open circuit voltage (Voc) of dye-sensitized solar cells (DSC). The results were explained by the fact that slow diffusion of I3 − species in nanopores increases opportunities of charge recombination between electrons…