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Enhancement of Conversion Efficiency of Dye-Sensitized Solar Cells(DSSCs) by Nb2O5 Coating on TiO2 Electrode  

Park, Seonyeong (Department of Chemical Engineering, University of Seoul)
Jung, Sukwon (Department of Chemical Engineering, University of Seoul)
Kim, Jung Hyeun (Department of Chemical Engineering, University of Seoul)
Publication Information
Korean Chemical Engineering Research / v.48, no.4, 2010 , pp. 506-510 More about this Journal
Abstract
Electron recombinations in electrolyte solution reduce light-to-energy conversion efficiency at the nanoporous electrode surface of dye sensitized solar cells. In this study, we improved the conversion efficiency using an energy barrier at the nanoporous electrode surface to control the recombination process. The energy barrier was formed by coating nanoporous $TiO_2$ electrode with $Nb_2O_5$ material. We investigated the influence of energy barrier on the cell efficiency depending on the coating thickness. Nanoporous $TiO_2$ electrode was coated about 5 nm thickness by 12 times coatings, and so the coating layer was grown about 0.417 nm for every time. Enhancement of conversion efficiency from 2.55% to 4.25% was achieved at 0.834 nm coating thickness, and it was believed as the optimum thickness for minimizing the electron recombination process in our experimental system.
Keywords
Dye Sensitized Solar Cells; Core-Shell nanoporous electrode; Energy barrier; Recombination;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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