cis-Dichloro-bis(4,4,-dicarboxy-2,2-bipyridine)osmium(II)-Modified Optically Transparent Electrodes:Application as Cathodes in Stacked Dye-Sensitized Solar Cells

摘要

An optically transparent cathode was developed for use in dye-sensitized solar cells.Fluorine-doped tin oxide conducting glass modified with a monolayer of cis-dichloro-bis(4,4'-dicarboxy-2,2'-bipyridine)osmium(II) efficiently reduces the oxidized form of the redox mediator.This transparent cathode transmits light that is not absorbed by the dyed TiO2;consequently,more than one cell can operate in optical tandem (i.e.,stacked).Two types of stacked cells are considered:one where both photoanodes are dyed with the same dye and one where the photoanodes are dyed with different,spectrally complementary dyes.Overall behavior of these tandem cells is compared with single-cell analogs.