Efficient Inverted ITO-Free Organic Solar Cells Based on Transparent Silver Electrode with Aqueous Solution-Processed ZnO Interlayer

Figure 4

AFM images (3 μm × 3 μm) of ZnO films fabricated on (a) the ITO and (b) the MoO₃/Ag electrode. (c) and (d) are 3D plots for (a) and (b), respectively.

(a)

(b)

(c)

(d)