Tuning Shortwave Infrared Emission Wavelengths by Chemical Pressure in Cr3+,Ni2+ Co-Doped Spinel Phosphors
Journal
Advanced Optical Materials
ISSN
2195-1071
2195-1071
Date Issued
2025-04-18
Author(s)
Chen, Kuan‐Chun
Huang, Ming‐Hsuan
Huang, Wen‐Tse
Kamiński, Mikołaj
Cherng, Ding‐Hua
Lu, Kuang‐Mao
Leniec, Grzegorz
Mahlik, Sebastian
Abstract
A chemical pressure-induced shortwave infrared emission tuning strategy is constructed through partially inverse to normal and inverse spinel structural evolution. MgGa2O4:Cr3+,Ni2+ solid-solution systems with Al3+ and Sn4+ cation dopants are synthesized, and crystal phase change is observed. Electron paramagnetic resonance investigations reveal different results of how cation substitutions affect the microstructure of the Cr3+ clusters in two solid-solution series. The photoluminescence analysis presents tunable broadband Ni2+ emission, whose peak position can be effectively controlled from 1215 to 1465 nm via chemical pressure. Finally, phosphor-converted light-emitting diodes are prepared to demonstrate potential applications of shortwave infrared light sources on bio-image and anti-counterfeiting fields. Under 300 mA driving current, the radiant flux for Mg0.98Ga0.94AlO4:0.06Cr3+,0.02Ni2+ and Mg1.48Ga0.94Sn0.5O4:0.06Cr3+,0.02Ni2+ is 55.76 and 33.41 mW, respectively. This work provides insight into the chemical pressure affecting photoluminescent properties of Cr3+ cluster-contained spinel phosphors and reveals the importance of shortwave infrared light sources in various applications.
Subjects
chemical pressure
Cr3+ cluster
Cr3+–Ni2+ energy transfer
near-infrared phosphors
phosphor-converted light-emitting diode
spinel structure
SDGs
Publisher
Wiley
Type
journal article