Preparation of highly ordered TiO_2 nanotubes on Ti-foil for dye-sensitized solar cells

摘要

TiO_2 nanotube arrays were grown on Ti foil in mixed electrolyte by the anodizing process. TiO_2 nanotube arrays were immersed in the TiCl_4 solution to improve the photocurrent by enhanced charge transfer between TiO_2 and dye molecules on the activity surface. Internal resistance of dye-sensitized solar cells (DSSC) was measured by impedance spectroscopy measurements. Backside illuminated DSSC with TiCl_4-treated TiO_2 nanotubes exhibited a conversion efficiency of 1.45% and showed improved electron transfer.