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Effect of surface nanomorphology and interfacial galvanic coupling of pedot-titanium counter electrodes on the stability of dye-Sensitized Solar Cell

Publication Type : Journal Article

Thematic Areas : Nanosciences and Molecular Medicine

Publisher : Journal of Nanoscience and Nanotechnology

Source : Journal of Nanoscience and Nanotechnology, Volume 12, Number 8, p.6340-6345 (2012)

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Keywords : 4 ethylene dioxythiophene), 4-ethylene dioxythiophene), article, Bicyclo Compounds, chemistry, coloring agent, Coloring Agents, Conversion efficiency, Counter electrodes, DSSC, electric conductivity, electrochemical analysis, Electrochemical Techniques, Electrodes, Electron, Field emission cathodes, fused heterocyclic rings, Heterocyclic, microscopy, Nanomorphologies, Nanotechnology, PEDOT, Photocathodes, Photoelectrochemical cells, Platinum, Poly(3, polymer, Polymers, Redox reactions, Scanning, scanning electron microscopy, Solar cells, sunlight, Surface area, Surface properties, surface property, Titanium

Campus : Kochi

School : Center for Nanosciences

Center : Nanosciences

Department : Nanosciences and Molecular Medicine

Year : 2012

Abstract : The present study demonstrates a novel approach by which titanium foils coated with electropolymerized poly(3,4-ethylenedioxythiophene) (PEDOT) in combination with sputtered platinum can be processed into a high-surface area cathodes for dye-sensitized solar cells (DSSCs). A detailed study has been performed to elucidate how surface nanomorphology and I-/I3- redox reaction behaviors underlying these photocathodes impact the DSSC performances. From the analysis of the relevant electrochemical parameters, an intrinsic correlation between the photovoltaic performances and the cathode surface area has been deduced for such a system and explained on the basis of relative contributions of the galvanic coupling properties of the nanomorphology PEDOT film and platinum. Depending on the type of photocathodes incorporated, it was observed that these PEDOT coated cathodes can exhibit higher stability over a given time range and photo-conversion efficiencies 12-40%, higher than that achievable in absence of the intermediate PEDOT coatings. It has been shown that DSSCs based on such metal-polymer hybrid photo-cathodes allow significant room for improvement in the catalytic performance at the electrode/electrolyte interface. Copyright © 2012 American Scientific Publishers.

Cite this Research Publication : A. A. Madhavan, Kalluri, S., Paravannoor, A., Nagarajan, S., Subramanian, K. R. V., Nair, S., and Balakrishnan, A., “Effect of surface nanomorphology and interfacial galvanic coupling of pedot-titanium counter electrodes on the stability of dye-Sensitized Solar Cell”, Journal of Nanoscience and Nanotechnology, vol. 12, pp. 6340-6345, 2012.

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