A scattered wave model of electronic structure of Eu 2+ in BaMgAl 10O 17 and associated excitation processes

The excitation spectrum of a commercial blue phosphor, BaMgAl 10O 17:Eu 2+ (BAM) has been investigated assuming a distribution of the activator ions at three different sites: Beevers–Ross, anti-Beevers–Ross and mid-oxygen sites in the intermediate plane. The energy levels and wavefunctions of the Eu...

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Bibliographic Details
Published inJournal of luminescence Vol. 96; no. 2; pp. 95 - 105
Main Authors Mishra, K.C, Raukas, M, Ellens, A, Johnson, K.H
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2002
Subjects
BAM
Eu 2
Excitation spectrum
Molecular orbital
β-alumina
Molecular orbital
Eu 2
Excitation spectrum
β-alumina
BAM
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Summary:The excitation spectrum of a commercial blue phosphor, BaMgAl 10O 17:Eu 2+ (BAM) has been investigated assuming a distribution of the activator ions at three different sites: Beevers–Ross, anti-Beevers–Ross and mid-oxygen sites in the intermediate plane. The energy levels and wavefunctions of the Eu 2+ ions located at these sites have been calculated using the self-consistent field Xα scattered wave cluster molecular orbital approach (SCF-Xα-SW-MO). The molecular orbital eigenvalues are then utilized to develop an energy level diagram and the associated excitation spectrum. A comparison of the calculated excitation peaks with those from experiment provides support for distribution of Eu 2+ ions at multiple sites in BAM.
ISSN:0022-2313
1872-7883
DOI:10.1016/S0022-2313(01)00417-3