Iron (Fe) doped Zinc Oxide (ZnO) nanoparticle is a very important topic of study in the field of nanoscience and nanotechnology. We have prepared Iron doped ZnO nanoparticles by Wet chemical method. We report the optical properties of Iron (Fe) doped ZnO nanoparticles at different molarities (0.025M, 0.05M and 0.1M). The band gaps of all nanoparticles prepared at different molarities are calculated with the intercept on Y-axis of Tauc plot from UV absorption spectra using UV-Vis Absorption spectroscopy. It has been observed that band gap decreases as the molarity increases. At 0.025M, 0.05M and 0.1M band gap are found to be 4.9eV, 4.89eV and 2.7eV respectively. This reduction in band gap suggest that the band gap of prepared nanoparticles are shifted towards lower energy. This shifting in band gap the blue region gives the idea of blue shift quite well. This blue shift is dependent on the particle size of the nanoparticles.
Iron doped zinc oxide (Fe:ZnO) nanoparticles are prepared by wet chemical method at different molarities (0.025 M, 0.05 M and 0.1 M) and different temperatures (RT and 473 K). The nanoparticles are studied by X-ray diffraction (XRD), transmission electron microscopy (TEM) techniques. Crystallite sizes and lattice strain of nanoparticles are calculated by Williamson Hall (W-H) method. The average particle size of the nanoparticle is also calculated by Scherrer formula. Uniform deformation model (UDM), unifrom stress deformation model (USDM) and uniform deformation energy density model (UDEDM) are used to calculate stress, strain, and energy density involved in the sample. We get different particle sizes of nano particle perpendicular to different (hkl) planes. This shows that particles are not spherical in nature, particles are like rectangular block. It has been also observed from transmission electron micrograph that particles are of rectangular block types. The annealed sample shows larger particle size compared to the sample prepared at room temperature, which is an input for band gap engineering studies.
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