Dye-sensitized solar cell (DSSC) is an alternative photovoltaic application used to replace the liquid electrolyte dependent conventional photovoltaic cell. In this research, gel polymer electrolyte (GPE) was used to replace the unstable liquid electrolyte. This GPE consists of poly[1-vinylpyrrolidone-co-vinyl acetate] (P[VP-co-VAc]), tetrabutylammonium iodide (TBAI), sodium iodide (NaI), iodine (I 2 ), ethylene carbonate (EC), and propylene carbonate (PC). The GPE was tested for its ionic conductivity and an optimum level was reached at sample with 30% TBAI and 6% NaI at 1.17 3 10 23 S cm 21 . The DSSC was then fabricated with all GPEs and a photovoltaic performance study was conducted. As a result, the highest photovoltaic conversion efficiency (PCE), h for a single salt was 3.04% for 40% TBAI. When a second salt is added, the system showed improvement in efficiency, h to 4.54% with short circuit current density,
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