Significance of TiCl4 post-treatment on the performance of hydrothermally synthesized titania nanotubes-based dye-sensitized solar cells

摘要

In this investigation, the effect of concentration of TiCl₄ for the post-treatment of hydrothermally synthesized titania nanotubes-based working electrode for dye-sensitized solar cells has been studied. Hydrothermally synthesized TiO₂ nanotubes were treated with different concentrations of TiCl₄ to investigate the effect of TiCl₄ concentration. The solar cell performance increased with the increase in TiCl₄ concentration up to 0.5?M and leveled off. The best solar cell showed a short-circuit current density ( J _sc), open-circuit voltage ( V _oc), fill factor (FF) and efficiency ( η ) of 12.75?mA/cm^{2, 795?mV, 69.2?% and 7.04?%, respectively, while untreated TiO₂ nanotube showed J _sc, V _oc, FF and η of 2.4?mA/cm2, 899?mV, 78.9?% and 1.7?%, respectively.}