Synthesis and photoluminescence properties of novel red emitting phosphor Sr2LiSiO4F:Eu3+

• A series of Sr2LiSiO4F:Eu3+ phosphors were prepared by a solid-state reaction.
• The photoluminescence properties and decay behaviors were characterized and studied.
• The phosphors have better luminescence intensity color coordinates than that of commercial phosphor (Y,Gd)BO3:Eu3+.
• The phosphors can serve as a potential candidate as red emitting phosphor for n-UV based w-LEDs.

Novel red phosphors Sr2LiSiO4F:xEu3+ (0.01 ≤ x ≤ 0.15) were synthesized using high temperature solid-state reaction. The phosphors were characterized by X-ray diffraction (XRD) and photoluminescence (PL) as well as lifetimes. The influence of the doping concentration of Eu3+ on its relative emission intensity and decay behavior was discussed. The PL spectra show that the phosphors Sr2LiSiO4F:Eu3+ can be effectively excited by near ultraviolet (n-UV) light, and exhibit red emission with a dominant 5D0 → 7F2 transition at 617 nm. The decay time gradually decreases with increasing of the Eu3+ concentrations in the order of millisecond. The results indicate this phosphor could be a potential candidate as red emitting phosphor for n-UV InGaN-based w-LEDs.

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