Journal
APPLIED SURFACE SCIENCE
Volume 353, Issue -, Pages 835-842Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.06.181
Keywords
Zn-doped TiO2; Nanowall; Porous; DSSCs; Photoactivity
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Funding
- Universiti Kebangsaan Malaysia and Ministry of Higher Education (MOHE), Malaysia [DIP-2012-16, FRGS/1/2013/SG02/UKM/02/8]
- Ministry of Science, Technology and Innovation (MOSTI), Malaysia [06-01-02-SF1157]
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We report the study of the utilization of a new synthesized-photoactive materials of Zn-doped TiO2 nanowall (ZTNW) in a dye-sensitized solar cell (DSSC) and the study of the effect of Zn2+ concentration in the ZTNW on the DSSC performance. ZTNW was prepared directly on the ITO substrate using a liquid phase deposition (LPD) method in an aqueous solution containing TiO2 and Zn precursors. The effect of Zn2+ dopants on the performance of DSSC was studied by preparing the ZTNW with several concentrations of Zn2+, namely from 10.0 to 40.0 mM. It was found that the performance of DSSC with a structure of ITO/ZTNW/N719/Electrolyte/Pt increases with the increasing of Zn2+ concentration and optimum at 24.0 mM. Typical power conversion efficiency as high as 1.98% was obtained from the optimum ZTNW sample. The role of Zn2+ concentration in the device performance will be discussed and examined using electrochemical-impedance spectroscopy method. (C) 2015 Elsevier B.V. All rights reserved.
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