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Concentration dependence of luminescence in Cr3+-doped NaMgAl(C2O4)3−;9H2O crystals

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Volume
4
Issue
4
Identifiers
DOI: 10.1016/0022-2313(71)90043-3

Abstract

Abstract The 2E → 4A 2 emission spectra of Cr:NaMgAl(C 2O 4) 3−9H 2O have been recorded as a function of Cr 3+ concentration in the range 0.1 to 100%. The spectral changes in the R lines are ascribed to species in multiple sites and not to exchange interactions. Energy migration to quenching sites occurs at high concentrations via the 4T 2 (or 2T 1) state. Energy transfer in the 2E state is inefficient at all Cr 3+ levels. The vibronic sideband intensity is enhanced relative to the R lines as the Cr 3+ concentration is increased.

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