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Thermally Stable CaLu 2 Mg 2 Si 3 O 12 :Cr 3+ Phosphors for NIR LEDs
Author(s) -
Li Ruiyang,
Liu Yongfu,
Yuan Chenxu,
Leniec Grzegorz,
Miao Lijing,
Sun Peng,
Liu Zehua,
Luo Zhaohua,
Dong Rui,
Jiang Jun
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202100388
Subject(s) - phosphor , materials science , light emitting diode , quantum efficiency , optoelectronics , thermal stability , near infrared spectroscopy , diode , photoelectric effect , luminescence , spectroscopy , optics , chemical engineering , physics , quantum mechanics , engineering
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%.