Abstract: The influence of La3+ ion substitution on structural, optical, and dielectric properties of ZnO nanostructures synthesized using the co-precipitation process is discussed in this paper. The wurtzite hexagonal structure with space group P63mc is confirmed by the XRD results. The domain size, planner spacing and cell volume of the La/ZnO-400 samples were calculated to be 32.2 nm, 2.6849 nm and 67.018 Å3 respectively. SEM was used to conduct morphological research, element mapping and EDS (scanning electron microscope). The photoluminescence spectra were measured using a photoluminescence spectrometer with a 325 nm excitation wavelength. The stretching of the Zn-O bonds resulted in IR spectra with peaks about 535-640 cm-1, which were detected using an FTIR spectrometer. AC impedance spectroscopy of the La/ZnO-400 sample was performed at 310 K in the frequency range of 5 MHz to 50 Hz. The grain edge resistance of the La/ZnO-300 sample is 36.15 M (at 310 K).

Keywords: La doping, ZnO, SEM, EDS, FT-IR, Photoluminescence, AC Impedance

| DOI: 10.17148/IARJSET.2021.8685