Valence and environment of rare earth ions in CaAl2O4:Eu,R persistent luminescence materials |
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| Authors: | Jorma Hö lsä ,Taneli Laamanen,Mika Lastusaari,Marja Malkamä ki,Edmund Welter,Dariusz A. Zajac |
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| Affiliation: | 1. University of Turku, Department of Chemistry, FI-20014 Turku, Finland;2. Turku University Centre for Materials and Surfaces (MatSurf), Turku, Finland;3. Graduate School of Materials Research (GSMR), Turku, Finland;4. Deutsches Elektronen-Synchrotron, a Research Centre of the Helmholtz Association, Notkestrasse 85, D-22607 Hamburg, Germany |
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| Abstract: | The existence of the different R2+/R3+/RIV (R: rare earth) ions as well as the modifications in the structural environment around the dopant and co-dopants in CaAl2O4:Eu2+,R3+ persistent luminescence materials was studied by LIII edge X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) measurements at Hamburger Synchrotronstrahlungslabor (HASYLAB) at Deutsches Elektronen-Synchrotron (DESY) (Hamburg, Germany). The measurements were carried out at 10 and 296 K for selected rare earth (co-)dopants (Eu2+; Ce3+, Nd3+, Sm3+, and Yb3+). |
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| Keywords: | Persistent luminescence XANES EXAFS Europium Rare earth Calcium aluminate |
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