1. Broadband near-infrared persistent luminescence in Ni2+-doped transparent glass-ceramic ZnGa2O4
- Author
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Shuwei Deng, Kang Zhang, Jiao Wu, Zhiyuan Liu, Hongxiang An, Zhiyu Hu, Hai-Feng Li, Xiaoshuang Li, and Tianpeng Liu
- Subjects
Photoluminescence ,business.industry ,Chemistry ,General Chemistry ,Thermoluminescence ,Catalysis ,Molecular electronic transition ,law.invention ,Full width at half maximum ,Persistent luminescence ,law ,Atomic electron transition ,Materials Chemistry ,Optoelectronics ,Luminescence ,business ,Electron paramagnetic resonance - Abstract
Transparent glass-ceramic is a highly attractive class of materials for photonic application. Transition metal ions are promising candidates for luminescence centers thanks to the sensitivity to the ligand ions of d-d electron transition. Here, the broadband second near-infrared (NIR-II) photoluminescence was achieved via precipitation of ZnGa2O4:Ni2+ nanocrystals within a zinc gallium-silicate glass matrix by the crystallization process. Excited by 260 nm UV photon, ZnGa2O4:Ni2+ GC displays NIR-II emission peaking at 1240 nm and has a full width at half maximum wider than 288 nm, attributing to 3T2g(3F)→3A2g(3F) electronic transition of octahedral coordinated Ni2+ ions. Moreover, broad persistent luminescence of Ni2+ ions can be effectively obtained after irradiation in the UV light. Based on the electron paramagnetic resonance spectra and thermoluminescence method, a physical model was constructed to demonstrate the mechanism of persistent luminescence. This developed afterglow luminescent glass-ceramic exhibits a potential application in biological imaging.
- Published
- 2022
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