Abstract
We studied the structural and optical properties of Ba2Zn1-xNixWO6 (0 ≤ x ≤ 1) double perovskites prepared by a solid-state reaction route using various tools, such as X-ray diffraction (XRD), scanning electron microscopy/energy dispersive X-ray (SEM/EDX), ultraviolet (UV)-visible diffuse reflectance, and photoluminescence. Rietveld refinement of the powder XRD data revealed that the compounds were highly crystalline and had a cubic crystal structure within the space group Fm-3m. The XRD results were consistent with EDX spectra results. SEM images exhibited large variation in the particle size with increasing zinc (Zn2+) and nickel (Ni2+) cations. The band gap of Ba2Zn1-xNixWO6 oxides calculated from the diffuse reflection spectra using Tauc plot was found between 3.18 and 3.53 eV, which indicated a wide-band gap semiconductor behavior in all samples. Finally, the photoluminescence study was performed at room temperature. Due to the high reflectance of the prepared double perovskite, we suggest that the material can be used for sunglass fabrication or photovoltaic energy conservation.
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