• Optical band gap of Sn0.2Bi1.8Te3 thin films

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    • Keywords


      Thin films; band gap; optical absorbance; film thickness; size effect.

    • Abstract


      Sn0.2Bi1.8Te3 thin films were grown using the thermal evaporation technique on a (001) face of NaCl crystal as a substrate at room temperature. The optical absorption was measured in the wave number range 500–4000 cm-1. From the optical absorption data the band gap was evaluated and studied as a function of film thickness and deposition temperature. The data indicate absorption through direct interband transition with a band gap of around 0.216 eV. The detailed results are reported here.

    • Author Affiliations


      P H Soni1 M V Hathi2 C F Desai1

      1. Department of Physics, Faculty of Science, The M.S. University of Baroda, Vadodara 390 002, India
      2. Department of Chemistry, R.R. Mehta College of Science, North Gujarat University, Patan 384 265, India
    • Dates

  • Bulletin of Materials Science | News

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