Journal
MATERIALS RESEARCH BULLETIN
Volume 99, Issue -, Pages 398-402Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.11.042
Keywords
Photoluminescence; Long persistent luminescence; Traps
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Funding
- Young Talent Support Program of Faculty of Materials Science and Engineering, Kunming University of Science and Technology [14078342]
- Foundation of Natural Science of Yunnan Province [2016FB088]
- National Natural Science Foundation of China [61565009, 11664022]
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The as-prepared Ca3-x-yGa2Ge3O12 (CGGO): xTb(3+), yTm(3+) phosphors exhibit a color-tunable long persistent luminescence (LPL) after the near-ultraviolet irradiation. Our results indicate that the shallow traps act as not only the trapping centers but also the bridge that contributes to the release of the carriers from deeper traps at room-temperature (RT), improving the LPL properties significantly. Moreover, the CGGO: xTb(3+), yTm(3+) phosphors exhibit an advantageous LPL performance at high-temperature because of the existence of deeper defect states.
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