Effect of phase separation on optical and electrical properties of Sn-Sb-Se glassy films

Praveen Kumar, R. Thangaraj, T. S. Sathiaraj

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3 Citations (Scopus)

Abstract

This paper reports the effect of phase separation on the structural, optical and electrical properties of thermally evaporated Sn xSe 20 x (x = 10, 11, 12.5) films. The X-ray diffraction studies of the devitrified films show the crystallization of SnSe x Sn xSb 4Se 8 and Sn xSb 4Se x phases for x = 12.5 film, while Sb 3Se 3 is the other major phase in all the film samples. The optical constants are calculated by using Swanpole's standard envelop method. The dispersion of the refractive index is discussed in terms of the Cauchy's dispersion relation and the Wample-DiDomenico (WDD) single-oscillator model in the weak absorption region. The optical gap and the tailing parameter were calculated in the fundamental absorption region, while the Urbach energy was calculated by using the value of extinction coefficients. The dc conductivity measurements with temperature have also been performed and electrical conduction has been discussed in conjunction with the Meyer-Neldel rule for the present system. These results have been discussed taking into consideration the struc-tural modifications induced by the phase separation in the present system.

Original languageEnglish
Pages (from-to)1465-1470
Number of pages6
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume206
Issue number7
DOIs
Publication statusPublished - Jul 1 2009

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Electrical and Electronic Engineering

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