TiO2 doped with different ratios of graphene and optimized application in CdS/CdSe quantum dot-sensitized solar cells

• TiO2 was doped with different ratios of graphene and applied in quantum dot-sensitized solar cells (QDSSCs).
• The efficiency of QDSSCs was changed with the ratios of graphene composition.
• The QDSSCs incorporating 0.1 wt% graphene demonstrated a best power conversion efficiency of 2.8%.

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.

TiO2 doped with different ratios of graphene were prepared and applied in quantum dot-sensitized solar cells. 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.Figure optionsDownload as PowerPoint slide