標題: Fabrication and Characterization of Anodic Titanium Oxide Nanotube Arrays of Controlled Length for Highly Efficient Dye-Sensitized Solar Cells
作者: Chen, Chien-Chon
Chung, Hsien-Wen
Chen, Chin-Hsing
Lu, Hsuch-Pei
Lan, Chi-Ming
Chen, Si-Fan
Luo, Liyang
Hung, Chen-Shiung
Diau, Eric Wei-Guang
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 4-Dec-2008
摘要: The performance of dye-sensitized solar cells (DSSC), made of highly ordered anodic titanium oxide (ATO) nanotube (NT) arrays produced directly on Ti foil, depends on the length of these arrays. We controlled these lengths L from 4 to 41 mu m while varying the concentration (0.1, 0.25, 0.5, and 0.8 wt %) of the electrolyte (NH(4)F) in ethylene glycol in the presence of H(2)O (2 vol %) with anodization for various periods (t = 0.5-8 h). The compact and bundle layers introduced. during anodization were effectively removed upon simple ultrasonic cleaning in deionized water containing submicrometer particles of Al(2)O(3) in a small proportion. The photovoltaic performance of the NT-DSSC devices (NH4F at 0.5 wt %) made of ATO films, as prepared, increased from 3.0% to 5.2% as L was increased from 6 mu m (t = 0.5 h) to 30 mu m (t = 8 h). After treatment of the ATO films with TiCl(4) in a two-step annealing process, the optimized NT-DSSC device attained an overall efficiency of 7.0% power conversion.
URI: http://dx.doi.org/10.1021/jp806281r
http://hdl.handle.net/11536/8049
ISSN: 1932-7447
DOI: 10.1021/jp806281r
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
Volume: 112
Issue: 48
起始頁: 19151
結束頁: 19157
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