Effects of Titanium Oxide Nanotube Arrays with Different Lengths on the Characteristics of Dye-Sensitized Solar Cells
Figure 4
SEM images of 0.5 wt% NH4F + 2H2O + EG TNT arrays after cleaning, anodization, and annealing for varied periods. Top views for (a) 1 h, (c) 3 h, and (e) 5 h and side views for (b) 1 h, (d) 3 h, and (f) 5 h, respectively.
