Structural and dielectric properties of Al x Zn1−xO (x = 0, 0.02, 0.04, 0.06, 0.08 and 0.10) nanoparticles

The chemical precipitation method is followed for the synthesis of Al-doped ZnO nanoparticles (NPs) with varying doping concentrations (0, 0.02, 0.04, 0.06, 0.08, and 0.10 M). A single hexagonal crystalline phase of wurtzite structure has been confirmed for all the samples by X-ray diffraction. Crystalline size and microstrain of the un-doped and doped ZnO (NPs) is determined by the Williamson–Hall (W–H) analysis. The optical properties like band gap and Urbach energy are found out by the UV–visible spectroscopy. The functional bonds are detailed by Fourier transmission infrared spectroscopy. The dielectric properties have been shown by doped sample due to hopping mechanisms as compared to the undoped. The loss factor (tanδ) follows an inverse direction as correspond to frequency due to the presence of dielectric dispersion.