Some Physical Properties ofZn1-xGdxO Composites Prepared by Solid Phase Reaction Method

Abstract

Gd-doped ZnO samples prepared using the solid-phase reaction technique were investigated for their structural, optical, and dielectric properties. The presence of a hexagonal wurtzite phase was confirmed by XRD spectra, with the crystallite size distribution of 42.85, 45.38, and 47.13 nm. The grains showed an almost spherical shape, as revealed by FE-SEM images. The bonding behaviors of stretching modes such as O-H, O=C=O, and Zn-O were confirmed by FT-IR spectra. The optical energy gap gradually decreased (3.17, 3.18, and 3.20 eV, respectively), as confirmed by the optical absorption spectra. The PL spectra of all samples showed near-band emission, blue-shift emission, and green-shift emission peaks. The Gd-doped ZnO samples have a high dielectric, making them suitable as a coolant and insulator for transformers and charge storage devices. As the Gd concentration increases, the mobility and resistivity increase, according to Hall effect data.