Abstract
Employing the prepared pure TiO2 and Ni doped TiO2 as photoanode material, dye sensitized solar cells (DSSCs) are fabricated with ruthenium complex as dye-sensitizer [Cis-bis(isothiocyanato) bis(2, 2′-bipyridyl-4, 4′-dicarboxylato)ruthenium(II) also called as N3 dye] and LiI as redox electrolyte. In this concern, pure TiO2 and Ni–TiO2 are prepared through sol–gel technique. The structural, optical and electrical properties of the prepared materials are investigated using XRD, UV–Vis and impedance analyses respectively. The XRD pattern reveals pure crystalline anatase phase of pure TiO2 and Ni–TiO2 and the crystallite size was found to be in the range of 7–11 nm. UV–Vis spectroscopy shows the enhancement of absorption spectrum in UV region with red shift was observed by Ni doping. The electron transport properties of the prepared TiO2 and Ni doped TiO2 shows higher conductivity in 3% Ni doped TiO2 confirmed from impedance studies. The interfacial charge transport resistances and chemical capacitances of the fabricated DSSCs are evaluated from the EIS investigations and the photovoltaic performance of Ni doped TiO2 based DSSC shows enhanced efficiency up to 4%.
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The author TS thank, SRM University for the research fellowship and thank CeNSE, IISc Bangalore, India for photovoltaic studies.
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Sakthivel, T., Kumar, K.A., Senthilselvan, J. et al. Effect of Ni dopant in TiO2 matrix on its interfacial charge transportation and efficiency of DSSCs. J Mater Sci: Mater Electron 29, 2228–2235 (2018). https://doi.org/10.1007/s10854-017-8137-2
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DOI: https://doi.org/10.1007/s10854-017-8137-2