Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

被引：26
作者：
Antuzevics, A. [1 ]
Kemere, M. [1 ]
Krieke, G. [1 ]
Ignatans, R. [1 ]
机构：
[1] Univ Latvia, Inst Solid State Phys, Riga, Latvia
来源：
OPTICAL MATERIALS | 2017年 / 72卷
关键词：
Electron paramagnetic resonance; Luminescence; Oxyfluoride; Transparent glass ceramics; Europium ions; LUMINESCENT PROPERTIES; ESR CENTER; IONS; EU; GD-3+; EPR; AFTERGLOW; PHOSPHORS; CENTERS; EU-2+;
D O I：
10.1016/j.optmat.2017.07.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Different compositions of europium doped aluminosilicate oxyfluoride glass ceramics prepared in air atmosphere have been studied by electron paramagnetic resonance (EPR) and optical spectroscopy methods. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements show presence of homogenously distributed SrF2 nanocrystals after the heat treatment of the precursor glass. Efficient Eu3+ incorporation in the high symmetry environment of glass ceramics is observed from the photoluminescence spectra. EPR spectra indicate Eu3+ -> Eu2+ reduction upon precipitation of crystalline phases in the glass matrix. For composition abundant with Eu2+ in the glassy state such behaviour is not detected. Local structure around europium ions is discussed based on differences in chemical compositions. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：749 / 755
页数：7
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