A new graphene-based flexible solar cell with a power conversion efficiency >10% has been\ndesigned. The environmental stability and the low complexity of the fabrication process are the two\nmain advantages of the proposed device with respect to other flexible solar cells. The designed solar\ncell is a graphene/silicon Schottky junction whose performance has been enhanced by a graphene\noxide layer deposited on the graphene sheet. The effect of the graphene oxide is to dope the graphene\nand to act as anti-reflection coating. A silicon dioxide ultrathin layer interposed between the n-Si\nand the graphene increases the open-circuit voltage of the cell. The solar cell optimization has been\nachieved through a mathematical model, which has been validated by using experimental data\nreported in literature. The new flexible photovoltaic device can be integrated in a wide range of\nmicrosystems powered by solar energy.
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