Optical and EPR studies of Fe-doped CaAl12O19 near-infrared emitting phosphor

被引：4
作者：
Rodionovs, P. [1 ]
Kemere, M. [1 ]
Antuzevics, A. [1 ]
Sarakovskis, A. [1 ]
Fedotovs, A. [1 ]
Rogulis, U. [1 ]
机构：
[1] Univ Latvia, Inst Solid State Phys, 8 Kengaraga Str, LV-1063 Riga, Latvia
来源：
OPTICAL MATERIALS | 2023年 / 144卷
基金：
瑞典研究理事会;
关键词：
Luminescence; Electron paramagnetic resonance; Near-infrared; Vacuum ultraviolet spectroscopy; Reflected electron energy loss spectroscopy; SYNCHROTRON-RADIATION; SINGLE-CRYSTAL; LUMINESCENCE; PHOTOLUMINESCENCE; EMISSION; IONS; SPECTROSCOPY; CHEMISTRY; MECHANISM; HIBONITE;
D O I：
10.1016/j.optmat.2023.114342
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this article we report our results on optical and electron paramagnetic resonance studies of Fe-doped CaAl12O19. At room temperature, optical excitation in the ultraviolet region leads to highly intensive luminescence signal at around 810 nm that is ascribed to the emission of Fe3+. Measurements at low temperature revealed slight shift of the emission maximum and appearance of additional wide luminescence bands in the blue and near-infrared parts of spectrum. The dependence of the luminescence intensity and decay time on temperature and concentration of Fe3+ in the material has been studied. Electron paramagnetic resonance studies showed presence of at least two different paramagnetic centres related to Fe3+. The nature of the observed luminescence bands is discussed.
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页数：8
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