Enhanced Light Storage of SrAl2O4 Glass‐Ceramics Controlled by Selective Europium Reduction |
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| Authors: | Takayuki Nakanishi Kazune Watanabe Jumpei Ueda Koji Fushimi Setsuhisa Tanabe Yasuchika Hasegawa |
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| Affiliation: | 1. Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido, Japan;2. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan |
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| Abstract: | A luminescent Eu, Dy: SrAl2O4 glass‐ceramics with high transparency in the visible region was successfully synthesized using the frozen sorbet technique with the control of O2 partial pressure ( ) for the oxidation of Eu2+ ions. The glass‐ceramics include Eu2+, Eu3+, and Dy3+ ions, and thus exhibits three characteristic types of emission bands, 4f–5d at around 520 nm (Eu2+ ions), 4f–4f at 610 nm (Eu3+ ions), and 480 nm (Dy3+ ions). The Eu, Dy: SrAl2O4 glass‐ceramics provide remarkable long‐persistent luminescence under dark condition. The glass‐ceramics also exhibits color‐changing luminescence in the visible region based on their remarkable light storage properties. The luminescent Eu, Dy: SrAl2O4 glass‐ceramics using the frozen sorbet technique with control of  are promising materials for application in novel photonic and light storage materials. |
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