Tunable Luminescence and Energy Transfer Investigation in Sr8La2[(PO4)4.5(SiO4)2(BO4)0.5](BO2): Ce3+/Mn2+ for White-Light-Emitting Diodes

Abstract

Powder samples of Sr8La2[(PO4)4.5(SiO4)2(BO4)0.5](BO2) (SLP) doped with Mn2+ and Ce3+ were prepared by solid-state reaction method and their photoluminescence properties were studied for the first time. The crystalline structure of the samples was monitored by the X-ray powder diffraction (XRD) technique. The emission spectra of the phosphors show a blue broad band at about 420 nm of Ce3+ and an orange band at around 620 nm of Mn2+. Energy transfer mechanism from Ce3+ to Mn2+ in SLP host matrix was studied based on the decay lifetime data. In this work, the tunable emission colors from blue to orange have been achieved by tuning the relative ratio of the Ce3+ to Mn2+ based on the principle of energy transfer, and the developed phosphor could be promising as a single-component white-light-emitting phosphor for white light-emitting diodes (W-LEDs).