Abstract
In this work, we synthesized FeNi2S4/rGO composites as Pt-free counter electrode (CE) by one step hydrothermal method. Complete investigations of phase evolutions by XRD patterns and TEM indicate spinel structure with nanosheets and nanospherical morphologies. The individual spherical-shaped nanoparticles (30–35 nm) of FeNi2S4 were exploited on the 2D ultrathin rGO nanosheets surface. This is useful for the provision of further electrolyte adsorptions and responsive electrocatalytic sites. The DSSC constructed with FeNi2S4/rGO hybrid composite CE showed a conversion efficiency of 9.98%, better than that by FeNi2S4 CE (4.87%) and also commercial Pt (6.21%). The outstanding efficiency of the FeNi2S4/rGO hybrid composite CE is even better than commercial Pt and is an effective alternative to Pt CE in the DSSCs.
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