摘要： The undoped and various magnesium (Mg) doped cadmium oxide (CdO) thin films were synthesized by spray pyrolysis technique. Structural, optical and morphological examinations of the samples were carried out via various instruments. X-ray diffraction (XRD) and Raman spectroscopic measurements of the samples were performed to obtain structural properties. Ultraviolet (UV)-visible and photoluminescence (PL) spectroscopy measurements as well as scanning electron microscopy (SEM) were employed to characterize optical and morphological properties of the undoped and Mg doped CdO thin film. XRD measurements revealed that both the undoped and Mg doped CdO thin films demonstrated a cubic structure and had preferential orientations along the (200) plane. In the Raman spectrum, it was observed that the peak (266 cm?1) of the first peak belonging to the CdO thin film disappeared and the second main peak (908 cm?1) shifted to higher energies with the Mg dopant. As a result of the absorbance measurements, the band range of the samples showed a shift of the band gap from 2.15 eV to 2.43 eV with the Mg dopant, and the Burstein-Moss effect indicated a shift to gray scale and decreased from 67% to 59% in transmittance measurements. The PL results exhibited that both the undoped and Mg doped CdO thin films had a UV emission of 394 nm (3.15 eV), blue emission of 434 nm (2.86 eV), blue-yellow emission of 540 nm (2.30 eV), 735 nm (1.69 eV) and emission of 782 nm (1.59 eV). The SEM measurements indicated that the CdO thin films changed from pyramidal structures to random shape with Mg dopant.