Different TiO_2 nanotubes for back illuminated dye sensitized solar cell: fabrication, characterization and electrochemical impedance properties of DSSCs

摘要

In the present work we reported the fabrication of different TiO_2 nanotube arrays (TiO_2 NTs) by anodization method. When used in dye-sensitized solar cells, the TiO_2 NTs prepared in the two-step anodization process (2-step TiO_2 NTs) showed better efficiency than those of TiO_2 NTs prepared in one step anodization process (1-step TiO_2 NTs). The 2-step TiO_2 NTs show a remarkable efficiency of 1.56 %. This is higher than those of TiO_2 NTs prepared in one step anodization process. Electrochemical impedance spectroscopy has been performed for qualitative analysis of charge transport process in dye-sensitized solar cells.