Abstract
Phyllanthus reticulatus, a natural sensitizer has been extracted from Karunelli fruit for the fabrication of TiO2 based DSSCs. The extracted dye shows the visible light optical absorption at a wavelength of around 520 nm. The presence of anthocyanin in the dye extract has been identified by the functional molecular groups such as intermolecular –OH bond, conjugate C=O stretching vibrations using FTIR. A commercial P25 TiO2 anatase powder has been employed for the fabrication of photoanode on fluorine doped tin oxide (FTO) substrate using Doctor-blade technique. The Platinum (Pt) counter electrode has been prepared using electron beam evaporation technique with a thickness of ~200 nm. To measure the photoconversion efficiency of the stacked DSSCs, the electrodes are assembled into a cell module and illuminated by a light source simulating AM 1.5 with a light intensity of 100 mW/cm2. The freshly prepared sensitizer (P. reticulatus pH ~5.5) exhibits the photo-conversion efficiency of 0.19%, while decreasing the pH of the sensitizer (pH ~1.0) enhances the photoconversion efficiency to six times (0.69%) higher than that of fresh one.
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Acknowledgements
The work was financially supported by Ministry of New and Renewable Energy (MNRE) [Grant No. GAP 03/12], New Delhi. The authors acknowledge the Director of CSIR-CECRI for permitting to carry out the research work and his constant encouragements.
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Arulraj, A., Govindan, S., Vadivel, S. et al. Photovoltaic performance of TiO2 using natural sensitizer extracted from Phyllanthus Reticulatus . J Mater Sci: Mater Electron 28, 18455–18462 (2017). https://doi.org/10.1007/s10854-017-7792-7
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DOI: https://doi.org/10.1007/s10854-017-7792-7