Nanostructured CuO Thin Films Prepared through Sputtering for Solar Selective Absorbers
Figure 3
SEM images of CuO thin films prepared at room temperature, with oxygen to argon ratios of 1 : 1 (a) and 2 : 1 (b), and at substrate temperature 300°C with oxygen to argon ratios of 1 : 1 (c) and 2 : 1 (d).
