TiCl₄ Pretreatment and Electrodeposition Time Investigations of ZnO Photoelectrodes Preparation for Dye Sensitized Solar Cells

Figure 4

SEM images of preparation ZnO under different electrodeposition times: (a) 2 min, (b) 3 min, (c) 4 min, and (d) 5 min. Part of the insert of the red box for enlargement.

(a)

(b)

(c)

(d)