Abstract
In this study, we fabricate dye-sensitized solar cells (DSSCs) utilizing a photo sensitizer derived from N3 dye with a broad absorption spectrum. We employed metal-free pencil graphite-coated FTO counter electrodes, because of their cost-effectiveness and resistance to corrosion. To make the gel polymer electrolytes, we incorporated Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) due to its low crystallinity and brilliant solubility in organic solvents, which enable high liquid salt absorption capacity. The most efficient device demonstrated 4.74% efficiency when excited by 1.5 AM spectrum. We utilized Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and UV–Vis NIR spectroscopy to unveil the distinct functional groups, surface morphological properties of the gel polymer electrolyte, and optical properties of photo anode, respectively. The results of this work show significant promise for the development of highly efficient, cost-effective photovoltaic solar cells.
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