Fig. 4

X-ray photoelectron spectroscopy (XPS) analysis showing (a, c) Cu 2p and (b, d) O 1s region for of electrodeposited Cu2O and air annealed Cu–O film.

X-ray photoelectron spectroscopy (XPS) analysis showing (a, c) Cu 2p and (b, d) O 1s region for of electrodeposited Cu2O and air annealed Cu–O film.