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Received August 26, 2012
Accepted November 3, 2012
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Improved electrochemical performance of dye-sensitized solar cell via surface modifications of the working electrode by electrodeposition
Department of Chemical Engineering, University of Seoul, Seoul 130-743, Korea
jhkimad@uos.ac.kr
Korean Journal of Chemical Engineering, March 2013, 30(3), 620-625(6), 10.1007/s11814-012-0189-7
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Abstract
Modifications of the working electrode with TiO2 blocking or coating layers are carried by electrodeposition in TiCl3 precursor solution. The results suggest that the electrodeposited TiO2 blocking layer provides excellent agglutination between the FTO substrate and the active TiO2 layer. In addition, the electrodeposited TiO2 coating layer enhances the interconnections between the TiO2 nanoparticles and the FTO substrate, and therefore it increases the electron transport efficiency. The morphology and crystalline structure of the electrodeposited TiO2 layers are characterized by SEM, TEM, and XRD. The electrochemical impedance spectroscopy measurements show that the improved DSSC performance with the electrodeposited coating layer is mainly due to the increase in the lifetime of the conduction band electron in the TiO2 film. The photoelectron conversion efficiency of DSSC is increased from 3.47% to 5.38% by employing the TiO2 electrodeposited working electrode.
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References
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Han K, Kim JH, Mater. Lett., 65, 2466 (2011)
Maric R, Neagu R, Zhang-Steenwinkel Y, van Berke FPF, Rietveld B, J. Power Sources, 195(24), 8198 (2010)
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Han L, Koide N, Chiba Y, Islam A, Mitate T, Comptes Rendus Chimie., 9, 645 (2006)
Koide N, Islam A, Chiba Y, Han L, J. Photochem. Photobiol.A: Chemistry., 182, 296 (2006)
Yu Q, Wang Y, Yi Z, Zu N, Zhang J, Zhang M, Wang P, ACS Nano., 4(10), 6032 (2010)
Jang SR, Zhu K, Ko MJ, Kim K, Kim C, Park NG, Frank AJ, ACS Nano., 5(10), 8267 (2011)
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Sharma GD, Suresh P, Mikroyannidis JA, Electrochim. Acta, 55(7), 2368 (2010)
