Studies on isomeric effects of 2- and 4-Mercapto pyridine as dopants in polymer electrolyte in dye-sensitized solar cells |
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Authors: | B Muthuraaman S Ganesan B Joseph Paul P Maruthamuthu S Austin Suthanthiraraj |
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Affiliation: | Department of Energy, University of Madras, Guindy Campus, Chennai 600025, Tamilnadu, India |
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Abstract: | In this present work, isomers like 2- and 4-Mercapto pyridine were used as dopants (additives) in Poly (ethylene oxide) based polymer electrolyte and their effects in dye-sensitized solar cells (DSC) have been investigated. Due to the coordinating and plasticizing effects of Mercapto pyridine, enhanced ionic conductivity and reduced crystallinity of PEO polymer electrolyte accompanied by a better penetration of the same into the dye coated nanocrystalline TiO2 in order to have better performances were achieved. The 2-Mercapto pyridine doped PEO (E) shows comparatively better performance than 4-Mercapto pyridine doped one (F), is due to the fact that the π-electron donicity of 2-Mercapto pyridine is greater. These results suggests that the electron donating capacity of 2-Mercapto pyridine and 4-Mercapto pyridine would influence the interaction of nanocrystalline TiO2 electrode and I−/I3− redox couple leading to radical changes in the cell performance. |
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Keywords: | Dye-sensitized solar cells Poly (ethylene oxide) Impedance spectroscopy Polymer electrolytes |
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