NDLI: Luminescence and long-lasting afterglow in Mn$^{2+}$ and Eu$^{3+}$ co-doped ZnO–GeO$_{2}$ glasses and glass ceramics prepared by sol

Content Provider	Springer Nature Link
Author	Sanada, Tomoe Seto, Hisakazu Morimoto, Yusuke Yamamoto, Kazuhiro Wada, riyuki Kojima, Kazuo
Copyright Year	2010
Abstract	To develop new fluorescent and afterglow materials, Mn$^{2+}$ and Eu$^{3+}$ co-doped ZnO–GeO$_{2}$ glasses and glass ceramics were prepared by a sol–gel method and their optical properties were investigated by measuring luminescence, excitation and afterglow spectra, and luminescence quantum yield (QY). Under UV irradiation at 254 nm, some glasses and all of the glass ceramics showed green luminescence peaking at 534 nm due to the $^{4}$T$_{1}$ → $^{6}$A$_{1}$ transition of tetrahedrally coordinated Mn$^{2+}$ ions. The strongest luminescence was observed in a glass ceramic of 0.1MnO–0.3Eu$_{2}$O$_{3}$–25ZnO–75GeO$_{2}$ heat treated at 900 °C, with QY of 49.8%. All of the green-luminescent glasses and glass ceramics showed green afterglow, and the afterglow lasting for more than 60 min was obtained in a glass ceramic heat treated at 900 °C. It is considered that the Eu$^{3+}$ ions may behave as electron trapping centers to be associated with the occurrence of the green afterglow due to the Mn$^{2+}$ ions in the co-doped system.
Starting Page	82
Ending Page	86
Page Count	5
File Format	PDF
ISSN	09280707
Journal	Journal of Sol-Gel Science and Technology
Volume Number	56
Issue Number	1
e-ISSN	15734846
Language	English
Publisher	Springer US
Publisher Date	2010-07-07
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phosphors Glass Glass ceramic Optical properties Inorganic compounds Nanotechnology Optical and Electronic Materials Inorganic Chemistry Ceramics, Glass, Composites, Natural Methods
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Chemistry Materials Chemistry Biomaterials Condensed Matter Physics Electronic, Optical and Magnetic Materials

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