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Title: Effect of Sn on the optical band gap determined using absorption spectrum fitting method

We report the preparation and the optical studies on tellurium rich glasses thin films. The thin films of Se{sub 30}Te{sub 70-x} Sn{sub x} system for x= 0, 1.5, 2.5 and 4.5 glassy alloys prepared by melt quenching technique are deposited on the glass substrate using vacuum thermal evaporation technique. The analysis of absorption spectra in the spectral range 400nm–4000 nm at room temperature obtained from UV-VIS-NIR spectrophotometer [Perkin Elmer Lamda-750] helps us in the optical characterization of the thin films under study. The absorption spectrum fitting method is applied by using the Tauc’s model for estimating the optical band gap and the width of the band tail of the thin films. The optical band gap is calculated and is found to decrease with the Sn content.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Department of Physics, Himachal Pradesh University, Shimla, INDIA, 171005 (India)
  2. (India)
Publication Date:
OSTI Identifier:
22391747
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1661; Journal Issue: 1; Conference: ICCMP 2014: International Conference on Condensed Matter Physics 2014, Shimla (India), 4-6 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTRA; INFRARED SPECTRA; METALLIC GLASSES; QUENCHING; SELENIUM TELLURIDES; SPECTROPHOTOMETRY; SUBSTRATES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS; TIN COMPOUNDS; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA