Efficient and Broadband LiGaP2O7:Cr3+ Phosphors for Smart Near‐Infrared Light‐Emitting Diodes

By C. Yuan, Ruiyang Li, Yongfu Liu, Liangliang Zhang, Jiahua Zhang, Grzegorz Leniec, Peng Sun, Zehua Liu, Zhaohua Luo, R. Dong and 1 more. Laser & Photonics reviews, 2021

184 citations recorded by the source corpus.

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 ≈450 nm excitation, LGAP:Cr3+ shows broad NIR emission from 700 to 1100 nm with a bandwidth of ≈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.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/cb33d6018cd849924e25a34b5a8889a4b7778588