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Journal of Nanomaterials
Volume 2015, Article ID 545818, 6 pages
http://dx.doi.org/10.1155/2015/545818
Research Article

Achieving Enhanced Dye-Sensitized Solar Cell Performance by TiCl4/Al2O3 Doped TiO2 Nanotube Array Photoelectrodes

1Department of Electrical Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 461-701, Republic of Korea
2Department of Energy IT, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam-si, Gyeonggi-do 461-701, Republic of Korea

Received 9 January 2015; Revised 5 April 2015; Accepted 12 April 2015

Academic Editor: Neeraj Dwivedi

Copyright © 2015 Jin Soo Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

For various reasons, low cost, easy fabrication, and so forth, dye-sensitized solar cells (DSSCs) have been consistently studied in many laboratories. To improve the DSSCs performance, using an aqueous solution of titanium tetrachloride (TiCl4) treatment is one of many processes. Before the treatment of TiCl4, nanoporous TiO2 nanotubes (TNTs) are fabricated through a secondary anodization process. TiCl4 treatment on TNTs film enhanced short-circuit current density () and aluminum oxide (Al2O3) posttreatment enhanced open-circuit voltage (). As a result, Al2O3 posttreatment on TNTs film conversion efficiency of 8.65% is realized, which is 7% higher than TiCl4 treatment on TNTs film. In this work, we investigated that double dip-coating of TiCl4/Al2O3 treatment on TiO2 nanotubes film had an effect on enhancement of and due to improvement of electron transfer, increment of dye adsorption, and reduction of recombination rate of charge. Photoelectrode DSSCs with light-to-electric energy conversion efficiency were achieved under a simulated solar light irradiation of 100 mWcm2 (AM 1.5).