期刊
LIGHT-SCIENCE & APPLICATIONS
卷 5, 期 -, 页码 -出版社
CHINESE ACAD SCIENCES, CHANGCHUN INST OPTICS FINE MECHANICS AND PHYSICS
DOI: 10.1038/lsa.2016.124
关键词
persistent luminescence; photostimulation; short-wave infrared (SWIR); ytterbium ions (Yb3+)
类别
资金
- National Science Foundation (CAREER) [DMR-0955908, DMR-1403929]
- National Natural Science Foundation of China [81171463]
- China Scholarship Council
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1403929] Funding Source: National Science Foundation
The trivalent ytterbium (Yb3+) ion has been extensively used as an emitter in short-wave infrared (SWIR) lasers, a sensitizer to activate other lanthanide ions for up-conversion luminescence, and a spectral converter in Ln(3+)-Yb3+ doubly doped quantum cutting phosphors. Here we report a new function of the Yb3+ ion-as an efficient emitting center for SWIR persistent luminescence. We have developed the first real SWIR persistent phosphor, MgGeO3:Yb3+, which exhibits very-long persistent luminescence at around 1000 nm for longer than 100 h. The MgGeO3:Yb3+ phosphor is spectrally transparent to visible/near-infrared light (similar to 400-900 nm) and is a promising ultraviolet-to-SWIR spectral convertor. The MgGeO3:Yb3+ phosphor also exhibits a photostimulated persistent luminescence capability, where the SWIR persistent emission in an ultraviolet-light pre-irradiated sample can be rejuvenated by low-energy light (white or red light) stimulation. The MgGeO3:Yb3+ phosphor is expected to have promising applications in biomedical imaging, night-vision surveillance and photovoltaics.
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