▎ 摘　　要

To optimize the performance efficiency of quantum dot-sensitized solar cells (QDSSCs), TiO2 doped with different ratios of graphene were prepared and applied in quantum dot-sensitized solar cells. The graphene-TiO2 nanocomposites were prepared by using hydrothermal synthesis of the alcohol-water system between graphene and TiO2 nanoparticles. It was found that the efficiency of quantum dot-sensitized solar cells was changed with the ratios of graphene composition. The CdS/CdSe quantum dot-sensitized solar cells incorporating 0.1 wt% graphene in the TiO2 photoanode demonstrated the most improvement in power conversion with an efficiency of 2.8%, which was 37% higher than that of pure TiO2. (C) 2014 Elsevier B.V. All rights reserved.