Journal
JOURNAL OF LUMINESCENCE
Volume 238, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2021.118222
Keywords
Mechanoluminescence; Photostimulated luminescence; Trap distribution; Optical properties
Categories
Funding
- National Natural Sci-ence Foundation of China [51572195]
Ask authors/readers for more resources
In this study, LiTaO3:Pr3+,Gd3+ phosphors were synthesized and characterized for their photoluminescence, mechanoluminescence, and thermoluminescence properties. The mechanoluminescence intensity was greatly enhanced by co-doping with Gd3+ ions at an optimal concentration of 1 mol%. The enhanced mechanoluminescence was attributed to the regulated trap quantities and depths caused by co-doped Gd3+ ions, leading to improved optical storage properties.
LiTaO3:Pr3+,Gd3+ phosphors were obtained by traditional solid-state reaction methods. In order to study their characteristics, crystal structure, photoluminescence (PL), mechanoluminescence (ML), and thermoluminescence (TL) of materials were measured. The phosphors exhibited intense orange photoluminescence, and mechanoluminescence with two emission bands located at 511 and 618 nm, which are ascribed to P-3(0) to H-3(4) and D-1(2) to H-3(4) transitions of Pr3+, respectively. Mechanoluminescence intensity in LiTaO3:Pr3+ was greatly enhanced by co doped Gd3+ ions. The optimal co-doped concentration of Gd3+ was 1 mol%, and the ML intensity was about 173% times higher, compared with that of LiTaO3:Pr3+. An extremely small disturbance of afterglow (AG) was noted and the trap quality was measured through TL curves. The enhanced mechanoluminescence intensity was thought to be ascribed to the regulated trap quantities and trap depths caused by co-doped Gd3+ ions. The photostimulated luminescence (PSL) was also measured, Pr3+/Gd3+ co-doped LiTaO3 turned out to have good optical storage properties. In this work, a probable mechanism was proposed to elaborate the multi-luminescence process in LiTaO3:Pr3+,Gd3+, which thus expanded the application of mechanoluminescence materials in optical information storage.
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