Journal
MATERIALS TODAY CHEMISTRY
Volume 24, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mtchem.2021.100771
Keywords
Rare earth; Photoluminescence; Persistent luminescence; Cross-relaxation; Optical anticounterfeiting
Funding
- National Science Foundation of China [11874182]
- Science and Technology Project of the 13th Five-Year Plan of Jilin Provincial Department of Education [JJKH20190179KJ]
Ask authors/readers for more resources
In this study, an advanced dynamic optical anticounterfeiting strategy based on Na2CaGe2O6: Tb3+/Tb3+, Yb3+ phosphors was reported, which achieved dynamic variation of photoluminescence (PL) color and persistent luminescence, providing a more effective method for anticounterfeiting and information encryption.
Achieving dynamic optical anticounterfeiting is a significant breakthrough in improving safeguard information security for the easily imitated static photoluminescence (PL). Herein, we report an advanced dynamic optical anticounterfeiting strategy based on Na2CaGe2O6: Tb3+/Tb3+, Yb3+ phosphors combined with time-evolving dynamic multicolor PL and bi-temporal luminescent performance. Interestingly, during the irradiation of ultraviolet lamp, the cross-relaxation effect between Tb3+ ions results in the dynamic variation of PL color of Na2CaGe2O6: Tb3+ from red to green in seconds. Furthermore, the features of persistent luminescence of Na2CaGe2O6: Tb3+ is optimized by the new traps through the co-doping Yb3+ ions. These results provide a more effective method for the design of the novel advanced dynamic anticounterfeiting and information encryption. (C) 2022 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
