In order to further improve electrocatalytic ability of MoS2 counter electrode(CE) in fiber-shaped dye sensitized solar cells(FDSSCs), Ni element was introduced and Ni-Mo-S nanosheet array was prepared by a simple one-step hydrothermal process. By utilizing synergetic effects between two transition metals and more catalytically active edges in Ni-Mo-S nanosheet array, lower series transfer resistance(Rct) at the interface of CE/electrolyte in the electrochemical impedance spectra (EIS) measurement and higher cathodic peak current in the cyclic voltammetry (CV) measurement were obtained when compared with MoS2, indicating Ni-Mo-S processed superior electrocatalytic activity to MoS2. As a result, power conversion efficiency of Ni-Mo-S based FDSSC(6.3%) was found to be higher than MoS2-based FDSSC (4.2%), comparable to Pt based FDSSC(6.4%).
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