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

页码：749 / 755

页数：7

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