An Investigation on the effects of the substrate temperature and annealing on structural and optical properties of ZnSe thin films prepared by spray pyrolysis technique

Document Type : Research Paper

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Abstract

Zinc selenide  (ZnSe)  thin  films  were  prepared  by  spray  pyrolysis  technique  on  glass  substrate  at substrate  temperatures of  380, 400 ºC and then annealed in 400 ºC .Structure of the samples were studied by XRD and UV-Vis spectroscopy was used to investigate the optical properties. The results of the XRD data indicated that the samples  are amorphous  before annealing with small ZnO phase, but after annealing the optical studies showed that the band gap of the sample decreases and approached to the ZnSe band gap value. The one which was grown at 400 ºC substrate temperature is polycrystalline ZnSe with  prefer orientation of (111).

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References

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History

  • Receive Date: 05 April 2014
  • Revise Date: 08 August 2015
  • Accept Date: 04 April 2015

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