Boosting broadband short-wave infrared emission to achieve near-unity quantum efficiency via bridging Cr3+–Ni2+ in spinel solid-solutions towards light-emitting diode applications

Cr 3+ and Ni 2+ codoped Mg 0.5 Zn 0.5 Ga 2 O 4 SWIR phosphor exhibits a broadband emission centered at 1304 nm with a FWHM of 250 nm, achieving a near-unity internal quantum efficiency (IQE = 97.7%) and a good thermal stability (70.7%@423 K).