Thermally Stable CaLu 2 Mg 2 Si 3 O 12 :Cr 3+ Phosphors for NIR LEDs

作者：Ruiyang Li, Yongfu Liu, Chenxu Yuan, Grzegorz Leniec, Lijing Miao, Peng Sun, Zehua Liu, Zhaohua Luo, Rui Dong, Jun Jiang · 发表于：Advanced Optical Materials · 年份：2021 · DOI：10.1002/adom.202100388 · 被引用次数：143 · 研究领域：Luminescence Properties of Advanced Materials、Advanced Photocatalysis Techniques、Perovskite Materials and Applications

Abstract 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 Cr 3+ , the novel CaLu 2 Mg 2 Si 3 O 12 :Cr 3+ (CLMSG:Cr 3+ ) NIR phosphor is discovered that has an external quantum efficiency of 20.7% and high thermal stability (92.1%@100 °C). Under ≈450 nm excitation, CLMSG:Cr 3+ shows broad NIR emission from 650 to 900 nm with a band width of ≈120 nm. The fabricated tiny pcLED demonstrates bright NIR light (34.75 mW@100 mA) with photoelectric efficiency of 11.6%.