A NIR to NIR rechargeable long persistent luminescence phosphor Ca2Ga2GeO7:Yb3+,Tb3+
| Autor: | Xizheng Li, Dacheng Zhou, Junhe Zhou, Jun'an Lai, Jianbei Qiu, Zhangwen Long, Qi Wang, Xuhui Xu, Songhan Hu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Multi-mode optical fiber business.industry Energy transfer Near-infrared spectroscopy Quantum cutting Phosphor 02 engineering and technology General Chemistry Optical storage 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Low energy Persistent luminescence Geochemistry and Petrology Optoelectronics 0210 nano-technology business |
| Zdroj: | Journal of Rare Earths. 39:1520-1526 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/j.jre.2020.12.004 |
| Popis: | Near infrared to near infrared (NIR–NIR) photo-stimulated persistent luminescence (PSPL) has shown excellent potential in high-resolution bioimaging for deep tissues. However, the PSPL in NIR-Ⅱ region (900–1700 nm) is still lacking. In this work, Ca2Ga2GeO7:Yb3+,Tb3+ (CGGYT) phosphor with unique low-dimensional crystal structure was synthesized by high-temperature solid–state reaction. Thanks to the carriers transferring from deep traps to shallow ones induced by low energy light, the 978 nm PSPL originating from 2F5/2 to 2F7/2 transition of Yb3+ induced by multimode stimulating (980 nm or WLED) is successfully realized after pre-excited by UV lamp. The NIR PSPL of the specimen can be repeatedly stimulated after placed in dark for 12 h. Moreover, the results indicate that codoping with Tb3+ can significantly enhance the NIR-II PSPL owing to the quantum cutting persistent energy transfer (QC PET) from Tb3+ to Yb3+. Our study points to a new direction for the future development of multimode PSPL materials for bioimaging or multimode optical storage applications. |
| Databáze: | OpenAIRE |
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