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.
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(a) What factor(s) is responsible for the red shift of the CaS:Eu+ emission with respect to SrS:Eu? (b) The emission maximum for SrSe:Eu+ is -570 nm; what factor(s) is responsible for the blue shift of its emission with respect to SrS:Eu+?
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a To a first approximation the anion polarizability should be similar in SrS and CaS so the centroid ...View the full answer
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Related Book For
Solid State Materials Chemistry
ISBN: 9780521873253
1st Edition
Authors: Patrick M. Woodward, Pavel Karen, John S. O. Evans, Thomas Vogt
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