Phosphor compositions and short wavelength infrared emitting pcLEDs emitting in the 1600-2200 nm wavelength range

Abstract

A wavelength converting structure is provided, the wavelength converting structure including an SWIR phosphor having emission wavelengths in the range of 1600-2200 nm, the SWIR phosphor comprising a structurally disordered garnet material, a sensitizer ion, and at least one rare earth emitter ion. Also provided is a luminescent material having emission wavelength in the range of 1600-2200 nm, the luminescent material including (Gd3−u−v−x−y−zLuxTmyHozScvREu)[Sc2−a−bLuaCrbGadAle]{Ga3−cAlc}O12 with RE=La, Y, Yb, Nd, Er, Ce and 0≤u≤2, 0<v≤1, 0<x≤1, 0<y≤0.5, 0≤z≤0.05, 0<a≤1, 0<b≤0.3, 0≤c≤3, 0<d≤1.8, 0≤e≤1.8. An IR emitting device including the luminescent material may provide a broad-band emission in the wavelength range of 1600-2200 nm with a continuous emission spectrum over a spectral width of at least 500 nm.

Dependencies are inferred from the claim text.