Self-assembled monolayer of graphene/Pt as counter electrode for efficient dye-sensitized solar cellElectronic supplementary information (ESI) available: AFM image of self-assembled graphene nanosheets and a plot of FF against the total resistance. See DOI: 10.1039/c1cp22542a

Monolayer of PDDA/graphene/PDDA/H2PtCl6is fabricated on conductive glass using electrostatic layer-by-layer self-assembly technique, which is then converted to graphene/Pt monolayer for use as counter electrode in dye-sensitized solar cell (DSSC). As compared to the sputtered Pt counter electrode, the self-assembled monolayer reduces the Pt amount by about 1000-fold but exhibits comparable photovoltaic performance. This finding provides a new route to fabrication of cheap and efficient counter electrodes for flow-line production of DSSCs. [ABSTRACT FROM AUTHOR]