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

Abstract

ions. The champion SWIR phosphor exhibits a broadband emission centered at 1304 nm with a full width at half maximum (FWHM) of 250 nm, achieving a near-unity internal quantum efficiency (IQE = 97.7%) and a good thermal stability (70.7%@423 K). The fabricated SWIR pc-LED device delivers a high SWIR output power of 39.9 mW at 360 mA, enabling its application in non-destructive imaging and testing.