Abstract
TiO2 branched nanostructures could be efficient as photoanodes for quantum dot-sensitized solar cells (QDSCs) due to their large surface area for QD deposition. In this study, Mn-doped CdS/Mn-doped CdSe deposited branched TiO2 nanorods were fabricated to enhance the photovoltaic performance of QDSCs. Mn doping in CdS and CdSe retards the recombination losses of electrons, while branched TiO2 nanorods facilitate effective electron transport and compensate for the low surface area of the nanorod structure. As a result, the charge-transfer resistance (RCT), electron lifetime (τe), and the amount of QD deposition were significantly improved with branched TiO2 nanorod based Mn-doped CdS/Mn-doped CdSe quantum dot-sensitized solar cell.
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