▎ 摘　　要

A new simple strategy based on TiO2@reduced graphene oxide (rGO) composites for QDSSCs is demonstrated in this study. We prepare TiO2@rGO-2 photoanodes in which graphene was obtained through hydrothermal and high-temperature reduction. This task is conducted to make TiO2@rGO composite be uniformly mixed together. The SILAR method is applied to the QDs adsorption of TiO2@rGO composites. Compared with that of TiO2@ rGO-1 photoanodes, the complete reduction properties of TiO2@rGO-2 photoanodes result in a remarkable increase in the photovoltaic characteristics of solar cells. The relevant performance characteristics of QDSSCs are observed, and the current-voltage curve results show CdS/TiO2@rGO-2 and Mn2+ -CdS/TiO2@rGO-2 photoelectric conversion efficiencies of 1.51% and 2.54%, respectively. These measured values are almost 10% higher than those of cells with TiO2@rGO-1 as photoanode, in fact. Electrochemical impedance testing results show that the effective secondary reduction of graphene leads to this meaningful enhancement.