Graphene thin film based counter electrode for dye-sensitized solar cell

A new member of carbon materials, called graphene, comprised of a two-dimensional (2D) sheet of covalently I3⁻ bonded carbon atoms which is showing unique electronic property as well as strong catalytic activity. In this work, a new and effective counter electrode was designed by preparing the graphene thin film on fluorine doped tin oxide (FTO) substrate for the DSSCs. The DSSCs fabricated with graphene counter electrode demonstrated a reasonably high overall conversion efficiency of 3.01% with high short current density (JSC) of 11.54 mA/cm2, open circuit voltage (VOC) of 0.7V and fill factor of 0.42, resulting from the enhanced morphological and electrochemical properties of graphene counter electrode by the use of PVP as wrapping agent‥