期刊
ADVANCED OPTICAL MATERIALS
卷 9, 期 16, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202100388
关键词
CaLu; Mg-2; Si-2; O-3; (12); Cr; (3+); garnets; near‐ infrared phosphor; NIR‐ LED device; night vision
资金
- National Natural Science Foundation of China [12074393]
- Zhejiang Key Research and Development [2021C01024]
- Science and Technology Plan of the Inner Mongolia Autonomous Region [2019GG263]
- Public Projects of Zhejiang Province [LGC19B010001]
- Youth Innovation Promotion Association Chinese Academy of Sciences [2021295]
A novel NIR phosphor, CLMSG:Cr3+, was discovered with high external quantum efficiency and thermal stability, emitting broad NIR spectrum under excitation around 450 nm. The fabricated tiny pcLED showed relatively high photoelectric efficiency.
Near-infrared (NIR) phosphor-converted (pc) light-emitting diode (LED) is a promising next-generation tiny light source for smart and broadband NIR spectroscopy technology. However, NIR phosphors suffer from challenges in terms of low efficiency and thermal stability. Herein, by selecting a host with large bandgap and weakening the coupling effect to Cr3+, the novel CaLu2Mg2Si3O12:Cr3+ (CLMSG:Cr3+) NIR phosphor is discovered that has an external quantum efficiency of 20.7% and high thermal stability (92.1%@100 degrees C). Under approximate to 450 nm excitation, CLMSG:Cr3+ shows broad NIR emission from 650 to 900 nm with a band width of approximate to 120 nm. The fabricated tiny pcLED demonstrates bright NIR light (34.75 mW@100 mA) with photoelectric efficiency of 11.6%.
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