One dimensional zinc oxide (ZnO) nanostructures were fabricated using a low temperature chemical bath deposition technique. The ZnO nanorods were doped with cobalt using cobalt nitrate with cobalt concentration varying from 0% to 9%. The scanning electron microscope images of the nanostructures indicate that the diameter of ZnO nanorods increased with the increase in cobalt doping concentration. The optical characterizations of the doped and undoped samples were performed by investigating the variation in the band gap, the Urbach energy, the index of refraction, and the extinction coefficient with cobalt concentration. The dispersion of index of refraction in cobalt doped ZnO nanostructures was modeled based on the Wemple DiDomenico single oscillator model. The interband oscillator energy and the dispersion energy were estimated for different cobalt doped ZnO nanorod samples based on this model.
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28 October 2017
Research Article|
October 31 2017
Variation of index of refraction in cobalt doped ZnO nanostructures
Amrit Kaphle;
Amrit Kaphle
1
Department of Physics and Engineering Physics, University of Tulsa
, Tulsa, Oklahoma 74104, USA
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Parameswar Hari
Parameswar Hari
1
Department of Physics and Engineering Physics, University of Tulsa
, Tulsa, Oklahoma 74104, USA
2
Oklahoma Photovoltaic Research Institute, University of Tulsa
, Tulsa, Oklahoma 74104, USA
Search for other works by this author on:
Journal of Applied Physics 122, 165304 (2017)
Article history
Received:
August 25 2017
Accepted:
October 18 2017
Citation
Amrit Kaphle, Parameswar Hari; Variation of index of refraction in cobalt doped ZnO nanostructures. Journal of Applied Physics 28 October 2017; 122 (16): 165304. https://doi.org/10.1063/1.5001713
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