Enhanced efficiency of dye-sensitized solar cells through TiCl4-treated, nanoporous-layer-covered TiO2 nanotube arrays

Title
Enhanced efficiency of dye-sensitized solar cells through TiCl4-treated, nanoporous-layer-covered TiO2 nanotube arrays
Author(s)
박정현[박정현]김재엽[김재엽]김재홍최철종[최철종]김현수[김현수]성영은[성영은]안광순
Keywords
CIRCUIT; FILMS
Issue Date
201110
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v.196, no.20, pp.8904 - 8908
Abstract
TiCl4-treated, nanoporous-layer-covered TiO2 (Type II) nanotube arrays are fabricated through a two-step anodization process followed by treatment with TiCl4. A dye-sensitized solar cell (DSSC) with TiCl4-treated, nanoporous-layer-covered Type II TiO2 nanotubes is compared with other DSSCs based on untreated Type II and both untreated and TiCl4-treated, conventional TiO2 (Type I) nanotube arrays. The TiCl4 surface treatment's effects on dye adsorption, charge transport, and electron lifetime are dependent on the morphologies of the TiO2 nanotubes. The TiCl4-treated Type I nanotubes allow higher dye adsorption, whilst the TiCl4-treated Type II nanotubes provide much faster electron transport and enhanced electron lifetime. This is because there are fewer defect traps in the nanostructure well-aligned without bundling, which contributes to the significantly improved cell performance over the DSSC with the TiCl4-treated Type I nanotubes. (C) 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/24447http://dx.doi.org/10.1016/j.jpowsour.2011.06.063
ISSN
0378-7753
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공과대학 > 화학공학부 > Articles
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