Abstract
Molybdenum sulfide/graphene oxide (MoS2/GO) composite was prepared using an in-situ hydrothermal route. The MoS2/GO composite serves as low-cost and high efficient platinum-free counter electrode for dye-sensitized solar cells. Cyclic voltammetry analysis indicates that the MoS2/GO electrode possesses high electrocatalytic activity and fast reaction kinetics for the reduction of triiodide to iodide at the counter electrode, which is due to special structure and compositions of MoS2/GO film. The solar cell with the novel MoS2/GO counter electrode achieves a higher power conversion efficiency of 6.69% under standard light illumination, which exceeds that of the cell with a Pt counter electrode (5.25%).