Fluorescence and phosphorescence properties of Ba4(Si3O8)2:Eu2+, Re3+ (Re:Dy,Ho)

► Prominently enhanced long afterglow over 3 cd/m2 is obtained with the codoping of Ho3+. ► The trap depth in Ba4(Si3O8)2:Eu2+, Dy3+ is about 0.748 eV. ► The traps depth in Ba4(Si3O8)2:Eu2+, Ho3+ ranges from 0.608 eV to 1.156 eV.