期刊
ADVANCED OPTICAL MATERIALS
卷 7, 期 23, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201901187
关键词
energy transfer; Mn2+ luminescence; red-emitting phosphors; zero-thermal quenching
资金
- National Natural Science Foundation of China [21671201, 11974022, 11574003, U1632101, 11375278]
- China Postdoctoral Science Foundation [2018M643285]
- Guangdong Science and Technology Planning Project [2016A020210066]
- Guangzhou Science and Technology Planning Project [201707010461]
- NSERC of Canada [RGPIN-2014-04113]
- DOE Office of Science [DE-AC02-06CH11357]
- CFI
- NSERC
- University of Saskatchewan
- CHIR
- NRC
- CLSI Graduate and Post-Doctoral Student Travel Support Program
Mn2+-activated phosphors usually show green to red luminescence depending on the crystal field strength in the lattice. However, the severe intensity loss of Mn2+ luminescence at elevated temperatures remains to be a serious problem. Here, the observation of zero-thermal quenching of Mn2+ red luminescence (lambda(em) = 620 nm) up to 500 K in Eu2+, Mn2+-codoped BaMgP2O7 is reported. This phenomenon arises from an efficient energy transfer from sensitizers Eu2+ which, when singly doped, exhibits a substantial thermal-induced enhancement of 5d -> 4f emission intensity at 400 nm, along with a high luminescence efficiency and a large UV light absorption capacity. The present results open up a new path to the exploration of Eu2+, Mn2+-codoped materials for thermally stable red phosphors.
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