Novel efficient SrMgY3(SiO4)3F:Ce3+,Tb3+ phosphor with tunable color and thermal stability through energy transfer

A novel apatite-type SrMgY3(SiO4)(3)F was synthesized by a high-temperature solid-state reaction. The crystal structure was refined using powder X-ray diffraction data. SrMgY3(SiO4)(3)F crystallizes in P6(3)/m hexagonal space group with lattice parameters of a = b = 9.45270 angstrom, c = 6.77617 angstrom, and V = 524.357 angstrom(3). The incorporation of the Ce3+ and Tb3+ ions into the matrix can generate bright blue and green lights under ultraviolet (UV) light excitation. The codoped Ce3+ and Tb3+ in SrMgY3(SiO4)(3)F can effectively improve green emission intensity and thermal stability through the energy transfer from the Ce3+ to Tb3+ ions. With the increase of Tb3+-doping content, the luminescent color of phosphor changes from blue to cyan and finally to green. SrMgY3(SiO4)(3)F:0.06Ce(3+),0.90Tb(3+) phosphor exhibited intense green light emission with a quantum yield of 59.49% and good thermal stability, with an emission intensity at 150 degrees C was 96% of that at 30 degrees C. Finally, the prepared sample was coated on 365 nm UV chips to fabricate white light-emitting diodes with a color rendering index of 82.6 and a correlated color temperature of 2912 K, demonstrating its potential for applications in display and lighting.

Automated summary

A novel apatite-type SrMgY3(SiO4)(3)F phosphor was synthesized and doped with Ce3+ and Tb3+ ions to achieve blue and green light emission under UV excitation. The codoping of Ce3+ and Tb3+ ions effectively improved the green emission intensity and thermal stability. The luminescent color of the phosphor could be tuned from blue to green by adjusting the Tb3+ doping content.