Graphene doping of P3HT:PCBM photovoltaic devices

We have introduced solution-processable functionalized graphene material (SPFGraphene) in P3HT/PCBM photovoltaic devices. The best results were obtained with a P3HT/PCBM (1:1) mixture with 10 wt% of graphene is open-circuit voltage (Voc) of 0.64 V, a short-circuit current density (Jsc) of 5.3 mA/cm2 and a FF of 0.41 which led to a power conversion efficiency of 1.4% at illumination at 100 mW/cm2 AM1.5. This device takes advantage of the electron-accepting feature of fullerenes and the high electron transport capability of graphene. The results indicate that the addition of graphene enhances the performance of polymer photovoltaic cells.