Thin films of Cu2O were electrodeposited and characterised by techniques in
cluding XRD, SEM-EPMA, and spectrophotometry. The structure, morphology, co
mposition, and optical properties of the films depend on the electrochemica
l bath and deposition parameters. The kind of substrate pretreatment proces
s also seems to have an effect on film properties. The electrodeposited Cu2
O films may be used for photovoltaic, photothermal, and oxygen sensor appli
cations.