SrS, CaS, and SrSe all crystallize with the cubic rock-salt structure. The emission for SrS:Eu 2+ reaches

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SrS, CaS, and SrSe all crystallize with the cubic rock-salt structure. The emission for SrS:Eu2+ reaches a maximum near 620 nm. By comparison, the emission maximum for CaS:Eu2+ is ~660 nm.

(a) What factor(s) is responsible for the red shift of the CaS:Eu+ emission with respect to SrS:Eu? (b) The

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Solid State Materials Chemistry

ISBN: 9780521873253

1st Edition

Authors: Patrick M. Woodward, Pavel Karen, John S. O. Evans, Thomas Vogt

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