▎ 摘　　要

A well dispersed thin film of graphene on fluorine doped tin oxide (FTO) substrate was obtained by introducing polyvinylpyrrolidone (PVP) as a wrapping agent for dye sensitized solar cells (DSSCs). Wrapping of graphene by PVP was confirmed by the formation of ester bonds (-C-O-OC-), resulting in a highly packed uniform graphene thin film on FTO. The DSSCs fabricated with graphene-PVP counter electrode demonstrated a reasonably high overall conversion efficiency of 3.01% with high short current density (J(sc)) of 11.16 mA/cm(2), open circuit voltage (V-oc) of 0.726V and fill factor of 0.37. This might result from the low charge transfer resistance and high redox current density due to the high electrocatalytic activity. (c) 2012 Elsevier B.V. All rights reserved.