Co-sensitization of nanocrystalline TiO2 with the organic dye D2 and the zinc phthalocyanine dye TT1 improves light harvesting, Jsc and efficiency of DSC devices. However, the Voc of the co-sensitized cell is markedly inferior (∼130 mV) when compared to the reference device made with D2 only. We discuss the implications of our results with regard to selection criteria for dyes for co-sensitized DSCs.
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Clifford et al. (2010) studied this question.
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