The barrier–cluster model applied to chalcogenide glasses |
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Affiliation: | Faculty CE, Slovak University of Technology, 813 68 Bratislava, Slovak Republic;Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic |
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Abstract: | The aim of this article is to familiarize the readers with barrier–cluster model of the non-crystalline semiconductors, which is based on the assumption that in non-crystalline semiconductors, there exist micro-regions separated from each other by potential barriers. We suppose that these micro-regions in chalcogenide glasses are created by closed clusters. This model allows explanation not only of a number of important optical and electrical features of chalcogenide glasses, but also the results of X-ray structure measurements and ESR experiments. This concept gives a new look at the density of states within the forbidden band and at the exponential tails of the optical absorption. |
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