Trivalent cations in fluorescent zinc sulphide

Incorporation of monovalent cations in a lattice consisting of divalent ions is only possible to an appreciable extent when the lack of positive charge resulting from the substitution of a monovalent cation for a divalent one is compensated for. This compensation can be effected by a simultaneous in...

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Bibliographic Details
Published in:Physica 1950-01, Vol.16 (3), p.297-316
Main Authors: Kröger, F.A., Dikhoff, J.
Format: Article
Language:English
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Summary:Incorporation of monovalent cations in a lattice consisting of divalent ions is only possible to an appreciable extent when the lack of positive charge resulting from the substitution of a monovalent cation for a divalent one is compensated for. This compensation can be effected by a simultaneous incorporation of monovalent anions, or of cations of a valency higher than two. On this basis it is explained that ZnS becomes fluorescent by the monovalent activators Ag +, Cu +, Au + and Zn + when halogens or trivalent cations are present. Some of the trivalent ions incorporated in this way are found to cause effects of their own (electron traps, fluorescence, killing of fluorescence due to the other centres). An atomic model of the centres of fluorescence is given.
ISSN:0031-8914
DOI:10.1016/0031-8914(50)90028-0