Dr. Raj Kamal Yadav
Indian Journal of Pure & Applied Physics (IJPAP) (2019)
Authors: Raj Kamal Yadav, Pratima Chauhan
n this study, Mn-doped ZnO nanoparticles with compositional formula Zn1-x Mnx O (where, x = 0.00 and 0.10) have been synthesized by simple co-precipitation method. Rietveld refinement of X-ray patterns verifies that the obtained samples have been crystallized in single phase hexagonal wurtzite structure. X-ray peak profile analysis has been used for estimation of crystalline sizes and lattice strain induced by Mn2+ doping with the help of Williamson-Hall (W-H) analysis. The morphology of undoped and Mn-doped samples was examined using transmission electron microscopy (TEM) analysis. The mean particle size from TEM results are consistent with results obtained by the Scherrer’s formula and W-H analysis. From the optical studies, the absorbance spectra show the increment in energy band gap by Mn2+ doping. Photoluminescence (PL) spectra show different emission peaks due to different defect states. This paper heightens the understanding of structural and optical properties of Mn-doped nanoparticles and paves the path for its potential application in modern optoelectronic devices.
Ingenta Connect (2018)
Authors: Raj Kamal Yadav, Pratima Chauhan
n this study, an investigation on structural, morphological and optical properties of Co-doped ZnO {Zn1–x Co x O (where x = 0.00 and 0.10)} nanoparticles was done. Cobalt-doped Zinc oxide nanoparticles were synthesized by co-precipitation method. To identify the presence of cobalt in ZnO, Fourier transform infrared spectroscopy studies were done. X-ray diffraction analysis showed that the samples were crystallized in single phase hexagonal wurtzite structure. The UV-Vis absorption spectra showed a blue shift with Co-doping. The optical band gap was increased with Co-doping also confirmed size reduction. Photoluminescence spectra showed three emission peaks due to different defect state. The morphology of samples was examined using Scanning electron microscopy. This paper gives the understanding of optical and structural properties of transition metal doped ZnO nanoparticles.
