Issue 7, 2022

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
23 Dec 2021
Accepted
21 Feb 2022
First published
22 Feb 2022
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2022,3, 3238-3250

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

A. Coşgun Ergene, S. Khabbaz Abkenar, E. Deniz and C. W. Ow-Yang, Mater. Adv., 2022, 3, 3238 DOI: 10.1039/D1MA01234G

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