標題: Detachment and transfer of ordered TiO2 nanotube arrays for front-illuminated dye-sensitized solar cells
作者: Li, Lu-Lin
Chen, Yi-Ju
Wu, Hui-Ping
Wang, Niann S.
Diau, Eric Wei-Guang
應用化學系
Department of Applied Chemistry
公開日期: 1-Sep-2011
摘要: We report a method of detachment and transfer of one-dimensional TiO2 nanotube (NT) arrays to fabricate dye-sensitized solar cells (DSSCs) with illumination from the front side. The ordered NT arrays (tube length 20 mm) 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 TiO2 nanoparticles of thickness similar to 2 mu m. Dry etching of the NT surface in a highly dense plasma reactor under BCl3/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 (eta = 6.24%) significantly improved over those of a front-illuminated counterpart with an upright (face-up) structure (eta = 4.84%) and of a conventional back-illuminated device (eta = 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.
URI: http://dx.doi.org/10.1039/c0ee00474j
http://hdl.handle.net/11536/150357
ISSN: 1754-5692
DOI: 10.1039/c0ee00474j
期刊: ENERGY & ENVIRONMENTAL SCIENCE
Volume: 4
起始頁: 3420
結束頁: 3425
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