All-Solution-Processed InGaO₃(ZnO)_m Thin Films with Layered Structure

Figure 3

FE-SEM images of ZnO buffer layers with different coating conditions after annealing at 900°C for 2 hours; (a) 0.5 M, 2-time coated ZnO layer and (b) 0.2 M, 5-time coated ZnO layer.

(a)

(b)