The role of compensation defects in Eu3+ stabilization under reductive atmosphere in Sr2SiO4 matrix

Karol Szczodrowski , Justyna Barzowska , Natalia Górecka , Marek Grinberg

Abstract

Luminescent materials based on strontium orthosilicate doped with a fixed concentration of europium and co-doped with various concentrations of sodium, lithium and boron were synthesized in order to study the role of co-dopants in luminescent properties of europium ions. The obtained materials were characterized using powder X-ray diffraction (XRD) technique. The results of the optical measurements indicate that the incorporation of sodium or lithium increases emission intensity of Eu3+, but does not stabilize Eu3+ under reductive (5% H2/N2) atmosphere, which was observed for the boron co-doping. Moreover, it is shown that the sodium or lithium co-doping facilitates the reduction process of Eu3+ → Eu2+. The obtained results suggest that diffusion limited processes are crucial for the stabilization of Eu3+ during the reduction step of synthesis.
Author Karol Szczodrowski IFD
Karol Szczodrowski,,
- Institute of Experimental Physics
, Justyna Barzowska IFD
Justyna Barzowska,,
- Institute of Experimental Physics
, Natalia Górecka IFD
Natalia Górecka,,
- Institute of Experimental Physics
, Marek Grinberg IFD
Marek Grinberg,,
- Institute of Experimental Physics
Journal seriesJournal of Alloys and Compounds, ISSN 0925-8388
Issue year2018
Vol748
Pages44-50
Publication size in sheets0.5
Keywords in EnglishEu2+/Eu3+ luminescence, charge compensation defects, strontium orthosilicate, defects migration
DOIDOI:10.1016/j.jallcom.2018.03.111
URL https://doi.org/10.1016/j.jallcom.2018.03.111
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 09-04-2018, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 09-04-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 3.133 (2) - 2016=2.919 (5)
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