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Thermal annealing dependence of some physical properties of Bi-substituted Sn–Sb–Se glassy thin films
Published online by Cambridge University Press: 10 June 2009
Abstract
Bulk glasses of the Sn10Sb$_{20-x}$BixSe70 (0 $\leq $
x≤ 8) system were prepared by the conventional melt quenching
technique. Thin films were prepared by the thermal evaporation technique on
glass substrates. Appearance of some crystalline phases is observed from the
X-ray diffractograms after heat treatment below the glass transition
temperature for 1 h. Scanning electron microscopy studies also show the
presence of microcrystalline phases in the amorphous matrix after annealing
for 1 h. The effect of Bi concentration and heat treatment on the optical gap
and activation energy for dark conductivity were also investigated for the
pristine as well as annealed films. The results are discussed on the basis
of models related to the presence of defect states in chalcogenide
materials.
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- Research Article
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- © EDP Sciences, 2009
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