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: | 1-九月-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 |
顯示於類別: | 期刊論文 |