A trial separation: A dye-sensitized nanocrystalline TiO2 film (see scheme) is prepared in which a remarkably long-lived (4 s) charge-separated state can be generated. The key parameter that controls charge transfer at the dye/TiO2 interface is shown to be the spatial separation between the cation center of the dye and the electrode surface.
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Haque et al. (2005) studied this question.
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