Abstract
Two valence states of tin atoms are identified by Mossbauer and X-ray photoelectron spectroscopy in (As2Se3)1−z(GeSe)z−x(SnSe)x glasses; it is shown that the presence of bivalent tin in the structural network of a glass does not give rise to impurity conductivity and impurity optical absorption. It is suggested to regard (As2Se3)1−z(GeSe)z−x(SnSe)x and (As2Se3)1−z(GeSe2)z−x(SnSe2)x glasses as semiconductor solid solutions whose electrical properties depend both on the electrical properties of the starting components and on the composition of the solid solutions.
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