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

被引:9
作者
Ergene, Arzu Cosgun [1 ]
Abkenar, Sirous Khabbaz [1 ]
Deniz, Ece [1 ]
Ow-Yang, Cleva W. [1 ,2 ]
机构
[1] Sabanci Univ, Mat Sci & Nanoengn Program, Orta Mah Univ Cad 27, TR-34956 Tuzla Istanbul, Turkey
[2] Sabanci Univ, Nanotechnol Res & Applicat Ctr, Orta Mah Univ Cad 27, TR-34956 Tuzla Istanbul, Turkey
来源
MATERIALS ADVANCES | 2022年 / 3卷 / 07期
关键词
LONG PHOSPHORESCENCE; RAMAN; BORON; GLASSES; SPECTROSCOPY; MECHANISM; SRAL2O4; REDUCTION; MOLTEN; ROUTE;
D O I
10.1039/d1ma01234g
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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.
引用
收藏
页码:3238 / 3250
页数:13
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