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The influence of different acceptor coactivators on the luminescent properties of CaS: Ce polycrystals
Author(s) -
Bushtruk I. Ya.,
Demishev S. V.,
Gruzintsev A. N.
Publication year - 1990
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170250819
Subject(s) - impurity , thermoluminescence , luminescence , materials science , activator (genetics) , tetragonal crystal system , acceptor , calcium , phosphor , alkali metal , cathode , inorganic chemistry , chemistry , crystallography , crystal structure , optoelectronics , metallurgy , biochemistry , physics , organic chemistry , gene , condensed matter physics
The influence of coactivators, namely, alkali metals, on the luminance, spectral characteristics and defect composition (by thermoluminescence curves) of green luminophor CaS:Ce obtained by solid phase synthesis, is considered. The use of sodium and potassium is shown to increase the efficiency of cathode luminiscence from 8.5% to 20% and 15%, respectively. This is due to the effect of self‐compensation of the activator (Ce) and coactivator impurities changing the amount of calcium sulfate intrinsic defects. Studies have been made of the thin structure of the luminophor spectrum at 4 K.