An optimized poly(vinylidene fluoride-hexafluoropropylene)–NaI gel polymer electrolyte and its application in natural dye sensitized solar cells

摘要: Abstract Gel type polymer electrolytes with PVDF-HFP as host, NaI salt and EC/PC plasticizers have been prepared optimized for use in a dye sensitized solar cell (DSSC). The electrolyte containing 48 wt. % (PVDF-HFP)–32 wt. NaI–20 wt. (EC/PC) exhibits the highest room temperature conductivity of 1.53 × 10 −4 S cm −1 . This has used fabrication DSSC configuration FTO/TiO 2 /natural dye/electrolyte/Pt/FTO. natural dyes anthocyanin chlorophyll were solvent extracted from black-rice pandanus amaryllifolius leaves respectively. UV-vis absorption spectra anthocyanin, mixture volume ratio 1:1 recorded. shows an peak at 532 nm. In same region 536 nm also prominant 665 nm. On mixing two peaks are observed 536 best performance short-circuit current density 2.63 mA cm −2 , open-circuit voltage 0.47 V, fill factor 0.58 photo-conversion efficiency 0.72% under illumination 100 mW white light. Under lower light intensity 60 mW 30 mW enhanced to 0.59 0.60 increased 1.11% 1.85%