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

Stefan Carlson; Jorma Holsa; Taneli Laamanen; Mika Lastusaari; Marja Malkamaki; Janne Niittykoski; Riikka Valtonen

doi:10.1016/j.optmat.2008.12.020

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

Stefan Carlson, Jorma Holsa, Taneli Laamanen, Mika Lastusaari, Marja Malkamaki, Janne Niittykoski, Riikka Valtonen

MAX IV Laboratory

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	1877-1879
Journal	Optical Materials
Volume	31
Issue number	12
DOIs	https://doi.org/10.1016/j.optmat.2008.12.020
Publication status	Published - 2009

Subject classification (UKÄ)

Natural Sciences
Physical Sciences

Free keywords

Dysprosium
Cerium
Europium
Persistent luminescence
XANES
Ytterbium

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10.1016/j.optmat.2008.12.020

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@article{5e32b60aac15494380e13fc0c493d886,

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

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.",

keywords = "Dysprosium, Cerium, Europium, Persistent luminescence, XANES, Ytterbium",

author = "Stefan Carlson and Jorma Holsa and Taneli Laamanen and Mika Lastusaari and Marja Malkamaki and Janne Niittykoski and Riikka Valtonen",

year = "2009",

doi = "10.1016/j.optmat.2008.12.020",

language = "English",

volume = "31",

pages = "1877--1879",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

number = "12",

}

TY - JOUR

T1 - X-ray absorption study of rare earth ions in Sr2MgSi2O7:Eu2+,R3+ persistent luminescence materials

AU - Carlson, Stefan

AU - Holsa, Jorma

AU - Laamanen, Taneli

AU - Lastusaari, Mika

AU - Malkamaki, Marja

AU - Niittykoski, Janne

AU - Valtonen, Riikka

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Dysprosium

KW - Cerium

KW - Europium

KW - Persistent luminescence

KW - XANES

KW - Ytterbium

U2 - 10.1016/j.optmat.2008.12.020

DO - 10.1016/j.optmat.2008.12.020

M3 - Article

SN - 0925-3467

VL - 31

SP - 1877

EP - 1879

JO - Optical Materials

JF - Optical Materials

IS - 12

ER -

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

Abstract

Subject classification (UKÄ)

Free keywords

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