Journal
LASER & PHOTONICS REVIEWS
Volume 15, Issue 11, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.202100227
Keywords
electron-phonon coupling; LiGaP2O7; Cr3+; near-infrared phosphors; near-infrared-light-emitting diode devices; night vision
Categories
Funding
- National Natural Science Foundation of China [12074393]
- Zhejiang Key Research and Development [2021C01024]
- Science and Technology Plan of the Inner Mongolia Autonomous Region [2019GG263]
- Youth Innovation Promotion Association Chinese Academy of Sciences [2021295]
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A high external quantum efficiency LiGaP2O7:Cr3+ (LGAP:Cr3+) NIR phosphor was discovered with broad NIR emission and excellent performance, promising the use of this phosphor for high-performance broadband NIR LED.
Broadband near-infrared (NIR) phosphor-converted (pc) LED is promising next-generation tiny light source for smart and broadband NIR spectroscopy technology. However, NIR phosphors suffer from challenges in terms of low quantum efficiency and bandwidth. By selecting a host that has a big bandgap and weakening coupling effect among Cr3+, a novel LiGaP2O7:Cr3+ (LGAP:Cr3+) NIR phosphor that has a high external quantum efficiency (28.3%) is discovered. Under approximate to 450 nm excitation, LGAP:Cr3+ shows broad NIR emission from 700 to 1100 nm with a bandwidth of approximate to 170 nm. Importantly, the fabricated pcLED demonstrates bright broadband NIR light and an excellent performance in night vision. The results promise the use of the LGAP:Cr3+ phosphor for high-performance broadband NIR LED that employs only one tiny blue LED chip.
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