Abstract
ZnCdO ternary alloys with hexagonal structures were synthesized by a direct current (dc) magnetron sputtering method under different growth conditions. The effect of annealing on the structure, vibrational and optical properties of obtained films was systematically studied. All samples were characterized by X-ray diffraction, photoluminescence measurements, non-resonant and resonant Raman spectroscopy. Annealing in air improves the long-range order crystalline quality of the ternary alloys and promotes of the realization of the Cd-to-Zn substitution mechanisms. It is evidenced by the vanishing of the ZnO-related emission bands and LO phonons associated with additional phases after heat treatment. The annealing effect on the phonon spectra and electron-phonon interaction of the ZnCdO films is considered and discussed.
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