Abstract
? 2022 Elsevier B.V.The luminescence properties of yttrium aluminum garnet doped with variable chromium concentration were investigated under namely three different excitation wavelengths – 275 nm, 440 nm, and 580 nm. It was discerned that under 440 nm and 580 nm excitation, spin forbidden 2E→4A2 transition shows a typical trend of increasing emission intensity with concentration increase in the range of 320–900 nm. Whereas, when the compounds with an increasing nominal dopant concentration were excited with 275 nm radiation, an exponential decrease in emission intensity of spin allowed 4T2→4A2 transition (in the range of 700–1000 nm) was observed. It was demonstrated that the emission of a single compound with one dopant exhibits emission in almost half of the NIR region.
NSTL
Elsevier