One-Dimensional TiO₂ Nanostructures as Photoanodes for Dye-Sensitized Solar Cells

Figure 5

Illustrative FESEM cross-sectional (a) and top images (b) of a nanotube-array sample grown at 60 V in an ethylene glycol electrolyte containing 0.25 wt% NH₄F [63].

(a)

(b)