Detachment and transfer of ordered TiO 2 nanotube arrays for front-illuminated dye-sensitized solar cells

Lu Lin Li, Yi Ju Chen, Hui Ping Wu, Niann-Shiah Wang, Wei-Guang Diau*

*Corresponding author for this work

研究成果: Article同行評審

75 引文 斯高帕斯(Scopus)

摘要

We report a method of detachment and transfer of one-dimensional TiO 2 nanotube (NT) arrays to fabricate dye-sensitized solar cells (DSSCs) with illumination from the front side. The ordered NT arrays (tube length 20 μm) were detached from the NT-Ti substrate, as annealed, by means of a second anodization at 20 V for 4 h and then transferred, inverted, onto a transparent substrate of conducting oxide (TCO) with an interface of TiO 2 nanoparticles of thickness ∼2 μm. Dry etching of the NT surface in a highly dense plasma reactor under BCl 3/Cl 2 for 90 s opened previously closed ends of the tubes. The inverted (bottom-up) NT-TCO substrate was fabricated into a DSSC device that shows a cell performance (η = 6.24%) significantly improved over those of a front-illuminated counterpart with an upright (face-up) structure (η = 4.84%) and of a conventional back-illuminated device (η = 4.61%). Electrochemical impedance spectra (EIS) of the devices under one-sun irradiation were measured to rationalize the cell performances that are consistent with the corresponding interfacial impedances between the NT arrays and the electrode for collection of electrons.

原文English
頁(從 - 到)3420-3425
頁數6
期刊Energy and Environmental Science
4
發行號9
DOIs
出版狀態Published - 1 九月 2011

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