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Eu and Yb Excitation Mechanisms in ZnS, CaS, SrS and InP

Published online by Cambridge University Press:  21 February 2011

M. Godlewski ,
K. Światek  and
B. Monemar
M. Godlewski
Affiliation:
Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Al. Lotnikow 32/46, Poland
K. Światek
Affiliation:
Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Al. Lotnikow 32/46, Poland Dept. of Physics and Measurement TechnologyLinköping University, Linköping, Sweden
B. Monemar
Affiliation:
Dept. of Physics and Measurement TechnologyLinköping University, Linköping, Sweden
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Abstract

The role of the excitonic excitation mechanism of the rare earth (RE) intra-shell emission is discussed. Two cases are analyzed. For Yb ion in InP 4f-4f emission of Yb3+ is induced by energy transfer from bound exciton state to the RE core state. For Eu in CaS and SrS RE emission is induced by carrier trapping directly to the excited state of Eu2+ ion. Also in this case the intermediate excitonic state may participate in RE excitation, as suggested by some experimental results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 301: Symposium E – Rare-Earth Doped Semiconductors , 1993 , 275
Copyright
Copyright © Materials Research Society 1993

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References

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