Interface modification of MoS2:TiO2 counter electrode/electrolyte in dye-sensitized solar cells by doping with different Co contents

The MoS2:TiO2 counter electrode (CE) doped with different Co contents provides possibilities to improve photovoltaic performance of dye-sensitized solar cells. The experimental results revealed that the MoS2:TiO2:Co composite influences on the power conversion efficiency by enhancing electrocatalytic activity that serves to increase the value of the short circuit current. The optimized Co implanted CE promotes the overpotential modification at the MoS2:TiO2:Co CE/electrolyte interfaces. These results may be explained by assuming that the Co 3d orbit results in an increase in the probability of the reduction of I-3 (-) to I- and by conjecturing that the induced surface states by Co doping act as channels for electron transfer.