Broadband near-infrared persistent luminescence in Ni2+-doped transparent glass-ceramic ZnGa2O4
| Autor: | Shuwei Deng, Kang Zhang, Jiao Wu, Zhiyuan Liu, Hongxiang An, Zhiyu Hu, Hai-Feng Li, Xiaoshuang Li, Tianpeng Liu |
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| Rok vydání: | 2022 |
| Předmět: |
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 |
| Zdroj: | New Journal of Chemistry. 46:851-856 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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