Organic photovoltaic devices based on Solution-processable functionalized graphene

The authors 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 10wt% of graphene is open-circuit voltage (V_oc) of 0.64V, a short-circuit current density (J_sc) of 5.3mA/cm² and a FF of 0.41 which led to a power conversion efficiency of 1.4% at illumination at 100mW/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.