Oxide p-n Heterojunction of Cu₂O/ZnO Nanowires and Their Photovoltaic Performance

Figure 4

Cross-sectional SEM images of (a) Cu₂O/ZnO film, (b) Cu₂O/ZnO nanowire structures, and (c) ZnO nanowire arrays. (d) Schematic drawing of the Au/Cu₂O/ZnO nanowires/AZO/ITO/glass heterostructure solar cell. The inset shows plan-view SEM image of the Cu₂O layer deposited on the ZnO nanowires.

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