Synthesis and photoluminescence properties of Sr3(PO4)2:Re3+, Li+ (Re = Eu, Sm) red phosphors for white light-emitting diodes

Sr3(PO4)2:Re3+, Li+ (Re = Eu, Sm) red phosphors were prepared via a high temperature solid state reaction, and their structure and luminescence properties were investigated. X-ray diffraction patterns indicate that the phase of as-prepared samples is in good agreement with standard Sr3(PO4)2 structure. Under 395 nm excitation, the emission of Sr3(PO4)2:Eu3+ consists of a strong peak centered at 622 nm and two weak peaks centered at 598 nm and...