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Influence of In and Ag atoms on optical and electrical properties of some Ge–Sb–S glasses

Published online by Cambridge University Press:  31 January 2011

H. Tichá ,
L. Tichy  and
J. Klikorka
H. Tichá
Affiliation:
University of Chemical Technology, 53210 Pardubice, Czechoslovakia
L. Tichy
Affiliation:
Joint Laboratory for Chemistry of Solids of Czechoslovak Academy of Sciences, Prague, and of the University of Chemical Technology, Pardubice, 53210 Pardubice, Czechoslovakia
J. Klikorka
Affiliation:
Joint Laboratory for Chemistry of Solids of Czechoslovak Academy of Sciences, Prague, and of the University of Chemical Technology, Pardubice, 53210 Pardubice, Czechoslovakia
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Abstract

The influence of In and Ag atoms on the dc electrical conductivity and optical properties in the short wavelength edge region in Ge20Sb10S70 and Ge30Sb10S60 glasses has been examined. Contrary to the effect of In atoms, the Ag atoms at concentration levels below 4 at. % of Ag significantly influence the dc conductivity. Changes of the optical properties are less significant, and they are affected in a similar way by incorporation of In and Ag atoms into a glassy matrix. It is supposed that some of the Ag atoms are positively ionized to an Ag+ species that remains in the network. The 5s1 electron of Ag interacts with D+ states making, in the final state, an increase of D− defect states. Thus the Fermi level is shifted to the valence band and the dc conductivity increases.

Type
Articles
Information
Journal of Materials Research , Volume 2 , Issue 3 , June 1987 , pp. 361 - 365
Copyright
Copyright © Materials Research Society 1987

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References

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