Dynamic radiation-induced effects in chalcogenide vitreous compounds

V. Balitska, J. Filipecki, O. Shpotyuk, J. Swiatek, M. Vakiv.

Journal of Non-Crystalline Solids, vol. 287, 2001, p. 216-221.

Abstract

The experimental results on time degradation of radiation-induced darkening effects in vitreous chalcogenide semiconductors of ternary stoichiometric (As2S3)y(GeS2)1-y (y: 0.1, 0.2, 0.4, 0.6) and non-stoichiometric (As2S3)x(Ge2S3)1-x (x: 0.1, 0.2, 0.4, 0.8) systems with a variation of the average co-ordination number, Z, are discussed. It is established that adequate model for the quantitative description of these effects can be developed at the basis of bi-molecular relaxation function (RF) proper to annihilation of specific structural defects in the form of oppositively charged atoms with various co-ordinations. The observed features of the investigated dynamic radiation-optical changes in these glasses are explained by compositional dependences of their atomic compactness, as well as covalent bond statistics.

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