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Preparation, Design, and Characterization of the Novel Long Persistent Phosphors: Na2ZnGeO4 and Na2ZnGeO4:Mn2+

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A novel blue‐emitting phosphor Na2ZnGeO4 and a novel green‐emitting phosphor Na2ZnGeO4:Mn2+ have been newly developed via high‐temperature solid‐state reaction. The crystal structure of Na2ZnGeO4 has been identified. Energy transfer from Na2ZnGeO4 host to Mn2+ ions was affirmed. Undoped and Mn2+‐doped Na2ZnGeO4 phosphors exhibit blue and green long persistent luminescence (LPL) with persistent duration more than 40 min and 4 h, respectively. The traps created in host lattice were clarified. The LPL mechanism in Na2ZnGeO4 and Na2ZnGeO4: Mn2+ was discussed briefly. This investigation provides two new and efficient long persistent phosphors (LPPs).
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Document Type: Research Article

Publication date: May 1, 2015

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