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Compositional effects on properties of PbS1-xSex thin films

R. KUMAR1, GARIMA JAIN2, RAVINDRA SAINI2, PALLAVI AGARWAL2,*

Affiliation

  1. Department of Physics, S.S.V. College, Hapur, India
  2. Department of Physics, D.A.V.College,Muzaffar Nagar, C.C.S.University, Meerut India

Abstract

Solid solutions of Lead Chalcogenides are of considerable scientific interest owing to their manifold technological applications [1-5]. Solid solutions of PbS1-xSex system were prepared by taking the ingradients i.e. lead, sulphur and selenium in their elemental form. Thin films of the alloy were deposited by flash evaporation of the fused material on the glass substrate at room temperature. Their electrical properties viz. resistivity, Hall co-efficient, carrier concentration and mobility of the carriers were determined using vander pauw’s technique. The optical and structural properties were also studied. The absorption edge shifts towards longer wavelength side. Consequently the energy band gap becomes narrower. The electrical resistivity is also found to decrease which proves their utility at longer wavelengths. XRD patterns reveal the crystalline nature of the film which is also confirmed by SEM photographs at room temperature..

Keywords

Chalcogenides, Solid Solutions, Band gap, Absorption, Grain size.

Submitted at: June 2, 2009
Accepted at: July 23, 2009

Citation

R. KUMAR, GARIMA JAIN, RAVINDRA SAINI, PALLAVI AGARWAL, Compositional effects on properties of PbS1-xSex thin films, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 7, pp. 935-939 (2009)