期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 5, 期 1, 页码 127-133出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc03416k
关键词
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资金
- China Postdoctoral Science Foundation [2015M58131]
- Funds for Distinguished Young Scientists of Hebei Province, China [A2015201129]
- Natural Science Foundation of Hebei Province [A2014201035, E2014201037]
- Education Office Research Foundation of Hebei Province, China [ZD2014036, QN2014085]
- National Natural Science Foundation of China [50902042, 51672066]
A series of near-infrared (NIR) emitting Li2ZnGe3O8 (LZG): xMn(2+) phosphors were synthesized via a conventional solid state reaction. They can be obtained by controlling the heating temperature (950 degrees C) or changing the doping concentration of Mn2+ (900 degrees C). In particular, due to the transition of the crystal from ZnO6 to ZnO4, the NIR phosphors perform with different spectral widths when the Zn/Mg ratio in LZG: xMn(2+) is adjusted. The excitation spectrum is characterized by a broad band from 240 nm to 640 nm, centered at 475 nm and tailing on the low energy side. The emission spectrum presents a broad emission band from 650 to 900 nm with the main peak at 832 nm. Hence, the phosphors can convert visible and ultraviolet light to NIR emission. What's more, this kind of NIR phosphor is based on the mechanism of down-conversion, and it possesses excellent thermal effect properties.
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