Abstract
Tungsten oxide hydrate (WO3·H2O) nanoparticle and Iron tungstate/tungsten oxide (Fe2WO6/WO3) nanocomposite have been synthesized via a facile hydrothermal route. Structural, optical, morphological and electrical properties of the synthesized samples were characterized by X-ray powder diffraction (XRD), UV-Visible spectroscopy, Field effect scanning electron microscopy (FE-SEM) with Energy-dispersive X-ray spectroscopy (EDX) and DC electrical conductivity measurement respectively. The powder X-ray diffraction (XRD) results confirm the formation of Fe2WO6/WO3 nanocomposite. Variation in the electrical conductivity and activation energy was studied by DC electrical conductivity studies. Fe2WO6/WO3 nanocomposites show a significant enhancement in the degradation of methyl blue than WO3·H2O nanoplates. The significant enhancement was due to flower-like morphology and the narrowing of the optical band gap which reduces the electron-hole pair recombination rate. The dye-sensitized solar cell (DSSC) was fabricated using WO3·H2O and Fe2WO6/WO3 films as photoanodes and it was observed that Fe2WO6/WO3 photoanode shows highest power conversion efficiency (PCE) i.e., 4.69% which can be achieved through high dye absorbing capacity.
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