Photoluminescence and Nonlinear Optical Properties of Copper Doped Zinc Sulfide Thin Film

Document Type : Original Article

Authors

Assistant Professor, Department of Physics, Technical and Vocational University (TVU), Tehran, Iran.

Abstract

In this research, Un-doped zinc sulfide and copper doped thin films in concentrations of 3%, 4% and 7% were deposited on glass substrate by thermal evaporation method, followed by measuring and analyzing linear and non-linear optical properties of the prepared samples using Ultraviolet Visible spectrophotometry (UV-Vis), Photoluminescence (PL) and Z-scan device. The structural properties of the sample and quantitative analysis of data were examined using X-ray diffraction (XRD). Peaks resulted from charts showed that impurities in thin films of zinc sulfide did not led to a new phase in the samples, but relative intensity of peaks increased. Using measured data of the absorption spectrum, the absorption values and the nano-structured band gap of zinc sulfide and doped zinc sulfide with copper were calculated. The photoluminescence illustrated that with increasing concentrations of copper ions, PL intensity decreased. Non-linear optical measurements using continuous wave laser with wavelength of 532 nm for open and closed aperture showed that nonlinear absorption coefficient was positive for the zinc sulfide film and negative for zinc sulfide thin films with copper doped zinc. Furthermore, the refractive index and nonlinear absorption increase with increasing concentration.

Keywords

Main Subjects

References

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Karafan Quarterly Scientific Journal
Volume 18, Special Issue 1 - Serial Number 54
Art and Architecture/ Basic Sciences
September 2021
Pages 189-203

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History

  • Receive Date: 01 September 2020
  • Revise Date: 07 October 2020
  • Accept Date: 23 January 2021

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