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X-ray absorption study of rare earth ions in Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials

Carlson, Stefan LU ; Holsa, Jorma; Laamanen, Taneli; Lastusaari, Mika; Malkamaki, Marja; Niittykoski, Janne and Valtonen, Riikka (2009) In Optical Materials 31(12). p.1877-1879
Abstract
The valence of the europium dopant and selected rare earth co-dopants (Ce3+, Dy3+, and Yb3+) in the Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied by room temperature XANES measurements. The results indicated the co-existence of both divalent and trivalent europium in all the studied materials. The relative amount of Eu3+ was observed to increase upon increasing exposure to X-rays, as expected by the persistent luminescence mechanism. This suggests a simultaneous filling of oxygen vacancies initially created by the reducing preparation conditions. For the Dy and Yb co-dopants, only trivalent species were observed. On the other hand, traces of tetravalent cerium were present in the Eu,Ce co-doped materials. (c) 2009... (More)
The valence of the europium dopant and selected rare earth co-dopants (Ce3+, Dy3+, and Yb3+) in the Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied by room temperature XANES measurements. The results indicated the co-existence of both divalent and trivalent europium in all the studied materials. The relative amount of Eu3+ was observed to increase upon increasing exposure to X-rays, as expected by the persistent luminescence mechanism. This suggests a simultaneous filling of oxygen vacancies initially created by the reducing preparation conditions. For the Dy and Yb co-dopants, only trivalent species were observed. On the other hand, traces of tetravalent cerium were present in the Eu,Ce co-doped materials. (c) 2009 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dysprosium, Cerium, Europium, Persistent luminescence, XANES, Ytterbium
in
Optical Materials
volume
31
issue
12
pages
1877 - 1879
publisher
Elsevier
external identifiers
  • wos:000271367700037
  • scopus:70349094889
ISSN
0925-3467
DOI
10.1016/j.optmat.2008.12.020
language
English
LU publication?
yes
id
5e32b60a-ac15-4943-80e1-3fc0c493d886 (old id 1504844)
date added to LUP
2009-11-24 17:13:58
date last changed
2017-07-09 04:05:12
@article{5e32b60a-ac15-4943-80e1-3fc0c493d886,
  abstract     = {The valence of the europium dopant and selected rare earth co-dopants (Ce3+, Dy3+, and Yb3+) in the Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials were studied by room temperature XANES measurements. The results indicated the co-existence of both divalent and trivalent europium in all the studied materials. The relative amount of Eu3+ was observed to increase upon increasing exposure to X-rays, as expected by the persistent luminescence mechanism. This suggests a simultaneous filling of oxygen vacancies initially created by the reducing preparation conditions. For the Dy and Yb co-dopants, only trivalent species were observed. On the other hand, traces of tetravalent cerium were present in the Eu,Ce co-doped materials. (c) 2009 Elsevier B.V. All rights reserved.},
  author       = {Carlson, Stefan and Holsa, Jorma and Laamanen, Taneli and Lastusaari, Mika and Malkamaki, Marja and Niittykoski, Janne and Valtonen, Riikka},
  issn         = {0925-3467},
  keyword      = {Dysprosium,Cerium,Europium,Persistent luminescence,XANES,Ytterbium},
  language     = {eng},
  number       = {12},
  pages        = {1877--1879},
  publisher    = {Elsevier},
  series       = {Optical Materials},
  title        = {X-ray absorption study of rare earth ions in Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials},
  url          = {http://dx.doi.org/10.1016/j.optmat.2008.12.020},
  volume       = {31},
  year         = {2009},
}