Different weight percentage (1, 2 and 3wt%) of cobalt sulfide incorporated (CoS) incorporated electrospun poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) nanocomposite membranes were prepared by electrospinning technique. The surface morphology, crystallinity, porosity and electrolyte uptake of the electrospun nanocomposite membranes were examined. The prepared electrospun PVdF-HFP/CoS nanocomposite membranes (esCPM) were activated by ionic liquid electrolyte containing 0.5M LiI, 0.05M I 2 and 0.5M 4-tert butylpyridine, 0.5M 1-Butyl-3-methylimidazolium iodide in acetonitrile to obtain electrospun PVdF-HFP/CoS nanocomposite membrane electrolytes (esCPMEs). The uniformly dispersed CoS nanoparticles increase the charge transport and facilitate the diffusion of redox couple in the electrolyte system. The electrochemical characteristics of dye-sensitized solar cell (DSSC) depends on the amount of CoS incorporated in esCPME wasalso studied in detail. The photovoltaic performance of DSSC assembled using 1wt% of CoS incorporated esCPME was measured and it was found to be 7.34%, which is higher than that assembled using esPME (6.42%).
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