Borate polyanions tuning persistent luminescence in Eu and Dy co-doped strontium aluminate

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Ergene, Arzu and Khabbazabkenar, Sirous and Deniz, Ece and Ow-Yang, Cleva W. (2022) Borate polyanions tuning persistent luminescence in Eu and Dy co-doped strontium aluminate. Materials Advances, 3 (7). pp. 3238-3250. ISSN 2633-5409

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Abstract

Although the longest duration of persistent luminescence in Eu and Dy co-doped strontium aluminate (S4A7ED) is obtained by processing with 30 mol% B2O3 (S4A7EDB), this composition does not contain the highest amount of the long persistence phase. To elucidate how the structural arrangement of atoms in S4A7EDB induced by synthesis using 30-40 mol% B2O3 yields the longest persistence, the crystal environment of B in S4A7ED is evaluated by using micro-Raman and FTIR spectroscopy. Polyatomic vibration modes containing B-O are revealed, in forms of metaborate and other borate polyanions. Based on these results, we propose a structural model for S4A7EDB, in which B introduces non-bridging oxygen, which offers excess negative charge and enlarged adjacent Sr sites, both of which enable Eu and Dy dopant clustering that yields extreme persistent luminescence.
Item Type: Article
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Sabancı University Nanotechnology Research and Application Center
Depositing User: Cleva W. Ow-Yang
Date Deposited: 23 Aug 2022 15:43
Last Modified: 23 Aug 2022 15:43
URI: https://research.sabanciuniv.edu/id/eprint/44090

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