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AbstractAbstract
[en] Some electrical properties and optical band gap of un-irradiated and gamma irradiated, at different doses of 4, 20 and 33 kGy, of bulk Se92Sn8 glass have been studied. The I-V measurements, carried out in the temperature range of 187-296 K, have been done at different electric fields and exhibit an ohmic and a non-ohmic behavior at low and high fields, respectively, for both un-irradiated and γ-irradiated glass. In both cases, the conduction mechanism occurs due to Variable Range Hopping (VRH) of charge carriers in the localized states near Fermi level. As the γ-doses increase the amorphicity of the glass decreases, as monitored by the disorder parameter To, and the density of states N(EF) increases up to 20 kGy after which a reverse in both parameters is observed. The increase in γ-doses increase the values of the allowed indirect optical band gap Eg of Se92Sn8 glass up to 20 kGy after which Eg decreases but remain higher than that of un-irradiated glass.
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S0921-4526(10)00311-X; Available from http://dx.doi.org/10.1016/j.physb.2010.03.045; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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