Relationship between I3- Diffusion in titania nanopores modified with dyes and open circuit voltage of dye-sensitized solar cell

Abstract

Relative diffusion rates (R rel ) of I 3 − species in titania nanopores modified with various dye molecules were measured. Introduction of polar atoms such as O or F decreased R rel and open circuit voltage (V oc ) of dye-sensitized solar cells (DSC). The results were explained by the fact that slow diffusion of I 3 − species in nanopores increases opportunities of charge recombination between electrons in titania layer and I 3 − existing in the titania nanopores.

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