Optical Properties of (CdO)x(ZnO)1-x Thin Films Grown by Non–conventional Spray Pyrolysis

Composite cadmium oxides – zinc oxides, (CdO)x(ZnO)1-x, thin films are
grown with variable composition, x, by non–conventional spray pyrolysis
technique from two separate cavities. X-ray diffraction proves the formation of
cadmium and zinc peroxides upon deposition. Further annealing in air causes
a loss of crystallographic order in zinc oxide grains. Annealing does not affect
the structure of cadmium peroxide. The optical constants are estimated by the
Murmann’s exact equation from transmittance and reflectance in the
wavelength range between 400 and 2400 nm and show normal dispersion.
Highest luminescent yield is assigned for samples with composition x = 0.5.
Annealing causes increase in luminescence yield of (CdO)x(ZnO)1-x films that
could be explained in the framework of structural change.