標題: Enhancing Charge Collection in Dye-Sensitized Solar Cells by Trimming Sidewall of the TiO2 Nanotubes
作者: Kuo, Yu Yen
Lin, Jui Guo
Chien, Chao Hsin
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 2012
摘要: The morphological properties of TiO2 nanotube heavily influence the performance of dye-sensitized solar cell using TiO2 nanotube-array as the photoanode. We report an efficient trimming method of fabricating 18.8 mu m TiO2 nanotube-arrays with sidewall thicknesses ranged from 23 nm to 12 nm. With the photoanode of thin-wall nanotube-array, the photocurrent density of the dye-sensitized solar cell increased from 13.0 mA/cm(2) to 16.2 mA/cm(2) when the thickness of the sidewall was thinned down from 23 nm to 14 nm. Electrical impedance spectroscopy showed a significant difference of internal electrical characteristics between the solar cells with the as-prepared and with thin-wall nanotube-arrays. The thinning of the sidewall of the nanotubes had little influence on the diffusion of the electrons; the improvements in photocurrent density are the result of the more efficient infiltration of electrolyte into wider voids between neighboring thin-wall nanotubes. (C) 2011 The Electrochemical Society. [DOI: 10.1149/2.099202jes] All rights reserved.
URI: http://hdl.handle.net/11536/15294
http://dx.doi.org/10.1149/2.099202jes
ISSN: 0013-4651
DOI: 10.1149/2.099202jes
期刊: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume: 159
Issue: 2
起始頁: K46
結束頁: K49
顯示於類別:期刊論文


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  1. 000298637500099.pdf