Journal
SUPERLATTICES AND MICROSTRUCTURES
Volume 69, Issue -, Pages 53-64Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2014.02.002
Keywords
Fe doped Zn0.96Cu0.04O; X-ray diffraction; Optical property; FTIR spectra
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Funding
- University Grant Commission (UGC), New Delhi, India [41-968/2012 (SR)]
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Undoped and Fe doped Zn0.96Cu0.04O (Fe = 0.01, 0.02, 0.03 and 0.04) alloys were successfully synthesized by sol-gel method. The hexagonal wurtzite structure of ZnO could not altered by Cu and Fe doping and it was confirmed by X-ray diffraction spectra. The initial non-equilibrium substitution of Fe (0.01) led to increase the lattice parameters such as d-value, cell parameters, volume and bond length. But the lattice parameters were decreased after Fe = 0.01 due to the proper substitution of Fe3+ ions. The changes in lattice parameters, average crystal size, peak position and peak intensity confirmed the Fe substitution into Zn-Cu-O lattice. The change in surface morphology by Fe doping was studied by scanning electron microscope. The observed linear decrease of energy gap, red shift was explained by the sp-d spin exchange interaction of band electron with the d-electron of Fe. Presence of chemical bonding was confirmed by FTIR spectra. (c) 2014 Elsevier Ltd. All rights reserved.
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