Transport properties of semiconducting ternary vanadate glasses

Ghosh, A. (1995) Transport properties of semiconducting ternary vanadate glasses The Journal of Chemical Physics, 102 (3). pp. 1385-1389. ISSN 0021-9606

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Measurements are reported for the electrical dc conductivity of the semiconducting vanadium tellurite glasses containing P2O5, Sb2O3, or Bi2O3 in the temperature range 80-450 K. The experimental data have been analyzed in the light of existing theoretical models. It has been observed that the general behavior of the electrical conductivity is similar for all glass compositions. The high temperature conductivity data are consistent with Mott's models of phonon-assisted polaronic hopping in the nonadiabatic regime, while at low temperatures variable range hopping is valid. The small polaron hopping model of Schnakenberg is the best model to interpret the temperature dependence of the activation energy and the conductivity in the entire temperature range. The percolation model applied to the polaron hopping regime is also found to be consistent with the temperature dependence of the conductivity data at high and low temperatures. The various parameters obtained by fitting these models to the experimental data are found to depend on glass forming oxides other than the vanadium oxide.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Glass; DC Systems; Electric Conductivity; Vanadium Compounds; Tellurates; Phosphorus Oxides; Antimony Oxides; Bismuth Oxides; Amorphous Semiconductors; Temperature Range 0065-0273 K; Temperature Range 0273-0400 K; Temperature Range 0400-1000 K; Polarons; Hopping; Mott Scattering; Temperature Dependence; Activation Energy; Percolation Theory
ID Code:72862
Deposited On:29 Nov 2011 12:50
Last Modified:18 May 2016 17:56

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