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Cu3SnS4(CTS)nanoparticles with dendritic structure were synthesized by a facile solvothermal method.The NPswith unique structure are suitable as the precursor ofthe CE due to their large specific surface area.CTS powder wasdispersed in distilled water to form a uniform nanoparticle "ink".A pure CTS counter electrode for dye-sensitizedsolar cell(DSSC)was fabricated by coating the CTS "ink" on fluorine-doped tin oxide glass substrate.Electrochemical impedance spectroscopy indicated that CTS-based CE has a Pt-Iike electrocatalytic activity for thereduction of I3-to I-in DSSC.DSSC with this novel CE exhibited an impressive power conversion efficiency of 7.13%,which is similar to that Pt/FTO based device(7.24%).This work presents a new approach that usinginexpensive CTS replace noble metal Pt as counter electrode for developing low-cost DSSC.