423632.fig.002a
(a)
423632.fig.002b
(b)
423632.fig.002c
(c)
423632.fig.002d
(d)
Figure 2: SEM images of ZnO:In thin films deposited from 100 mL of spray solution at solution spray rates of (a) 0.5 mL/min, (b) 1.5 mL/min, (c) 3.3 mL/min, and (d) 6.7 mL/min. The cross-sectional views are presented as insets on the surface images.