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Growth and Characterization of Chemical bath Deposited Polycrystalline n-PbSe thin films

Author Affiliations

  • 1Department of Physics, Azad college, Ausa-413520, Maharashtra, INDIA
  • 2 Thin Film Research Laboratory, Department of Physics, Rajarshi Shahu Mahavidyalaya, Latur-413512, Maharashtra, INDIA

Res.J.chem.sci., Volume 1, Issue (5), Pages 48-51, August,18 (2011)

Abstract

Lead selenide thin films have been deposited using simple chemical bath deposition technique on amorphous glass substrate at 85oC temperature. The lead sulphate and sodium selenosulphate are used as source of materials to obtain lead selenide films. The Ďas-depositedí films were uniform, well adherent and dark brown in color. The films were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), optical absorption, and electrical conductivity measurement techniques. The XRD study confirms polycrystalline nature in FCC structure. The absorption spectrum showed an exponential edge. Lead selenide films showed an optical band gap of 0.325 eV with absorption coefficient 104 cm-1. The room temperature electrical conductivity was of the order of 10-3 (-cm)-1. The film exhibits n-type conductivity with activation energy of 0.153 eV.

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