Influence of Anodization Time on Photovoltaic Performance of DSSCs Based on TiO₂ Nanotube Array

Figure 1

The appearance of TiO₂ nanotube arrays in different stages of the preparation process: (a) Ti foil before treatment, (b) TNT arrays after the first anodization, (c) TNT arrays after second anodization, and (d) TNT arrays film eventually obtained.

(a)

(b)

(c)

(d)