Probing multimodal light emission from Tb/Yb-doped garnet nanophosphors for lighting applications.

Herein we report the solution-combustion-method-synthesized Tb- and Tb/Yb-doped GdGaO nanophosphors, which possess luminescent and magnetic properties. The phase formation/crystal structure, and morphology of the prepared nanophosphors are studied using X-ray diffraction (XRD)/Raman spectroscopy and a field emission scanning electron microscope (FE-SEM), respectively. Tb/Yb-doped phosphor samples exhibit green emission with an intense band around 544 nm through downshifting (DS) and upconversion (UC) processes because of the D → F transition of Tb.