Author/Authors :
faizzi, mohamad universiti kebangsaan malaysia - solar energy research institute (seri), Bangi, Malaysia , ludin, norasikin ahmad universiti kebangsaan malaysia - solar energy research institute (seri), Bangi, Malaysia , su’ait, mohd sukor universiti kebangsaan malaysia - solar energy research institute (seri), Bangi, Malaysia , mohamed, norani muti universiti teknologi petronas - centre of innovative nanostructures nanodevices (coinn), Bandar Seri Iskandar, Malaysia , sahudin, muhammad ameerullah universiti kebangsaan malaysia - school of chemical sciences and food technology, faculty of science and technology, Bangi, Malaysia , badri, khairiah haji universiti kebangsaan malaysia - school of chemical sciences and food technology, faculty of science and technology, Bangi, Malaysia , ahmad, azizan universiti kebangsaan malaysia - school of chemical sciences and food technology, faculty of science and technology, Bangi, Malaysia
Abstract :
In this investigation, optimization of iodide/triiodide (I^ –/I_3^–) ratios on palm-based polyurethane (PU) polymer electrolyte’s composition for solid-state dye sensitized solar cell (DSSC) application is explored. Polyurethane polymer electrolyte is synthesized under nitrogen gas atmosphere by pre-polymerization reactions between palm kernel oil monoester-OH (PKO-p) and methylene diphenyl diisocyanate (MDI) at different LiI/I_2 mole ratios. The effects of I –/I_3 – mole ratios optimization on photovoltaic characteristics (short circuit current density, open circuit voltage, fill factor and power conversion efficiency), photo-response behavior (internal quantum efficiency) and internal charge transport properties (charge transport and recombination resistance, and chemical capacitances) of solid-state DSSC is examined by light- current-voltage (LIV), incident photon-to-current efficiency (IPCE) and electrochemical impedances spectroscopy (EIS) measurements. The current-voltage characteristic of FTO/TiO_2-dye/PU-LiI-I_2/Pt at LiI/I2 1:0.125 mole ratio demonstrated a photovoltaic response with a power conversion efficiency of 1.8% under a standard AM 1.5G illumination with 42% of internal quantum efficiency. The short circuit current density (Jsc) and open circuit voltage (Voc) are measured at 8.7 mA cm^−2 and 0.68 V, respectively. These promising results could be a first step toward a new generation of low-cost and effective solid- state DSSC.
Keywords :
Bio , based polyurethane , dye sensitized solar cell , iodide , triiodide , polymer electrolytes
