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Publication Type : Journal Article
Publisher : Optical Materials, Elsevier.
Source : Optical Materials, Elsevier, Volume 79, p.210–219 (2018)
Keywords : Anthocyanins, DSSC, Sodium doping, yeast
Campus : Coimbatore
School : School of Engineering
Department : Mechanical Engineering
Verified : No
Year : 2018
Abstract : TiO2 nanostructures with two different dopants, sodium and yeast have been successfully synthesized by hydrothermal method. Doping sodium is found to extend the absorbance of TiO2 into the visible region as well as it acts as mordant in fixing and improving the absorption of dye. Yeast, as a dopant, can help in absorption of more anthocyanins from the natural dye extract by TiO2 and also aids in retaining the colour of the dye and increases the stability of the dye at varying pH. Anthocyanins are the major class of pigment present in the newly addressed maroon, velvety and trumpet shaped flower “Kigelia Africana”. X-ray diffraction analysis revealed the formation of rutile phase for all the samples. Field Emission Scanning Electron microscopy images revealed the formation of nanorods and nanoflowers with change in dopant as well as their concentration. The photoelectric conversion efficiency of DSSC with undoped TiO2 photoelectrode is 0.87% and DSSC with 6% Na doped TiO2 photoelectrode is 1.56%. The efficiency of DSSC with 6% Na+6% yeast doped TiO2 photoelectrode is found to increase from 2.09% (DSSC with 6% Na+4% yeast doped TiO2 photoelectrode) to 2.31% on varying the dopant concentration. Doping is also found to increase the dye absorption and superior charge transport efficiency which in turn helps to improve the performance of DSSC.
Cite this Research Publication : S. Shalini, Balasundaraprabhu, R., T. Satish Kumar, Sivakumaran, K., and Kannan, M. D., “Synergistic effect of sodium and yeast in improving the efficiency of DSSC sensitized with extract from petals of Kigelia Africana”, Optical Materials, vol. 79, pp. 210–219, 2018.