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Title: Structural and optical modification in Bi doped As{sub 40}S{sub 60} thin films

The influence of substitution of Bi atom instead of S atoms on the structural and optical properties of thin films of As{sub 40}S{sub 60} are reported. The density is found to be increased with the addition Bi heavy metal into As{sub 2}S{sub 3}. The amorphous to polycrystalline structure of the bulk sample is observed for Bi more than 7%. The glass transition temperature is found to be decreased with addition of Bi. The absorption edge shifts to shorter wavelength, thereby decreasing optical band gap of Bi{sub x}As{sub 40}S{sub 60-x} (x=0,2 and 4% here) film. The optical parameter change is discussed from the stand point of chemical bonds formed in the films and related to the defect states produced due to incorporation of Bi atoms in place of chalcogenide S atoms.
Authors:
 [1] ; ;  [2]
  1. Department of Physics, Utkal University, Bhubaneswar-751004 (India)
  2. Department of Physics, Indian Institute of Science, Bangalore-560012 (India)
Publication Date:
OSTI Identifier:
22490368
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; AMORPHOUS STATE; ARSENIC SULFIDES; BISMUTH; BISMUTH COMPOUNDS; CHEMICAL BONDS; DENSITY; DOPED MATERIALS; GLASS; MODIFICATIONS; OPTICAL PROPERTIES; POLYCRYSTALS; THIN FILMS; TRANSITION TEMPERATURE; X-RAY SPECTROSCOPY