Simulation of Perovskite Solar Cell with Graphene as Hole Transporting Material

The methyl ammonium lead halide (MAPbI(3)) based perovskite solar cells have been studied recently because of their high efficiency along with low cost. The designing of perovskite solar cells (PSCs) requires using efficient hole transporting material and electron transporting material. Graphene, with unique physical, structural and electrical properties, is expected to bring positive impact on the construction of PSCs. Therefore, in this theoretical study, we simulate the n-perovskite/perovskite/graphene solar cell using AFORS-HET (Automat for simulation of heterostructures) software. We have taken n-perovskite as the electron transporting material, perovskite as the active material and graphene for hole transporting material. Under the illumination condition of AM1.5G with active layer thickness 800nm, the J-V curve is plotted. From this curve, the power conversion efficiency of 9.64%, fill factor = 81.86%, J(sc) = 16.92 mA/cm(2) and V-oc = 699.2 mV are obtained. The variation of solar cell parameters with different active material thickness is studied. The variation of quantum efficiency of simulated structure with wavelength is observed. We also studied the energy band diagram with active material thickness.