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 techni...

Full description

Saved in:
Bibliographic Details
Main Authors: Heera, Pawan, Govt. College Amb, Himachal Pradesh, INDIA,177203, Kumar, Anup, Physics Department, Govt. College, Kullu, H. P., INDIA, 175101, Sharma, Raman
Format: Conference Proceeding
Language:English
Subjects:
ABSORPTION SPECTRA
INFRARED SPECTRA
MATERIALS SCIENCE
METALLIC GLASSES
QUENCHING
SELENIUM TELLURIDES
SPECTROPHOTOMETRY
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TIN COMPOUNDS
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4915429