Three-dimensional hierarchical TiO2 nanorods (HTNs) decorated with the N719 dye and 3-mercaptopropionic or oleic acid capped CdSe quantum dots (QDs) in photoanodes for the construction of TiO2 nanorod-based efficient co-sensitized solar cells are reported. These HTN co-sensitized solar cells showed a maximum power-conversion efficiency of 3.93, and a higher open-circuit voltage and fill factor for the photoanode with 3-mercaptopropionic acid capped CdSe QDs due to the strong electronic interactions between CdSe QDs, N719 dye and HTNs, and the superior light-harvesting features of the HTNs. An electrochemical impedance analysis indicated that the superior charge-collection efficiency and electron diffusion length of the CdSe QD-coated HTNs improved the photovoltaic performance of these HTN co-sensitized solar cells. © 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.
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M. R. Subramaniam and Dr. Duraisamy Kumaresan, “CdSe Quantum Dots and N719-Dye Decorated Hierarchical TiO² Nanorods for the Construction of Efficient Co-Sensitized Solar Cells”, ChemPhysChem, vol. 16, pp. 2543-2548, 2015.