Abstract
We present intensity-modulated photocurrent and infrared transmittance measurements on dye-sensitized solar cells based on a mesoporous titania (TiO2) matrix immersed in an iodine-based electrolyte. Under short-circuit conditions, we show that an elementary analysis accurately relates the two measurements. Under open-circuit conditions, infrared transmittance, and photovoltage measurements yield information on the characteristic depth at which electrons recombine with ions (the “locus of recombination”). For one particular series of samples recombination occurred near the substrate supporting the titania film, as opposed to homogeneously throughout the film.
Highlights
Dye-sensitized solar cells based on mesoporous titania
it appears that essentially every photon absorbed by a dye molecule generates a mobile electron in the porous TiO2
lower than what can be estimated from the differenceϷ1.1 Vbetween the redox potential in the electrolyte
Summary
Follow this and additional works at: https://surface.syr.edu/phy Part of the Physics Commons.
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