Luminescence properties of Sr2MgB2O6:Tb3+,Li+ green-emitting phosphor

(a) Temperature-dependent PL spectra of Sr2MgB2O6:0.09Tb3+,0.09Li+ phosphor excited by 368 nm (the inset shows a green emission LED made by coating Sr2MgB2O6:0.09Tb3+,0.09Li+ phosphor on a NUV (365-370 nm) chip); (b) the relationship between relative emission intensity at 545 nm (5D4→7F5) and the operating temperature; (c) the relation of ln[(I0/IT)-1] vs. 1/(kT) activation energy graph for thermal quenching of Sr2MgB2O6:0.09Tb3+,0.09Li+ phosphor