Nanostructured CuO Thin Films Prepared through Sputtering for Solar Selective Absorbers

Table 2

The absorptance values of CuO thin films prepared through room temperature sputtering after 2 h annealing at various temperatures.

Sample	Annealing temperature (°C)	Absorptance (𝛼)
A	200	0.71
	250	0.69
	300	0.51
	350	0.45