Journal
DALTON TRANSACTIONS
Volume 50, Issue 24, Pages 8457-8466Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt00791b
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [51902184]
- Shandong Provincial Natural Science Foundation [ZR2019BEM028]
- Shandong University [31370088963167]
- US National Science Foundation [DMR-1705707]
- College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum Minerals
Ask authors/readers for more resources
This study reports a Pr3+-doped UVC emissive persistent phosphor, Lu2SiO5:Pr3+, exhibiting intense UVC persistent luminescence peaking at 270 nm with a long persistence time of over 12 hours. The UVC persistent luminescence of this phosphor can be clearly monitored and imaged in bright environments, including direct sunlight and indoor light, using a corona camera.
Visible and infrared persistent phosphors have gained considerable attention in recent years and are being widely used as glow-in-the-dark materials in dark environments. In contrast, the progress in persistent phosphors emitting at the other end of the spectrum, i.e., the shorter-wavelength ultraviolet-C (UVC; 200-280 nm), is rather slow. Here we report the design and synthesis of a well-performing Pr3+-doped UVC emissive persistent phosphor, Lu2SiO5:Pr3+, which exhibits intense UVC persistent luminescence peaking at 270 nm and a long persistence time of more than 12 h after excitation with a 254 nm UV lamp. Besides, the UVC persistent luminescence of a UV pre-irradiated sample can be repeatedly revived after repeated short-illumination with low-energy white light via a process called photostimulated persistent luminescence. Owing to the distinct spectral features of UVC light and the self-sustained luminescence properties, the UVC persistent luminescence of the Lu2SiO5:Pr3+ persistent phosphor can be clearly monitored and imaged using a corona camera in bright environments including direct sunlight and indoor light. The Lu2SiO5:Pr3+ persistent phosphor is expected to find promising applications in the covert optical tagging field.
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