Synthesis and luminescence of Sr sub(3)Al sub(2)O sub(6) :Ce super(3+) powders synthesized by solid state reaction method with addition of H sub(3)BO sub(3)

Sr sub(3)Al sub(2)O sub(6):Ce super(3+) powders were synthesized using a solid state reaction method in air with addition of H sub(3)BO sub(3). The effects of Ce super(3+) dopant concentrations and the weight ratio (wt) of H sub(3)BO sub(3) to total raw materials weight on the formation of Sr sub(3)Al sub(2)O sub(6):Ce super(3+) samples were investigated. Single-phase and well-crystallized Sr sub(3)Al sub(2)O sub(6):Ce super(3+) samples can be obtained when the addition of H sub(3)BO sub(3) is lower than 7 wt%. The excitation spectrum indicates that Sr sub(3)Al sub(2)O sub(6):Ce super(3+) phosphor powders exhibit two excitation bands centered at 345 and 462 nm. The emission spectrum shows that Sr sub(3)Al sub(2)O sub(6):Ce super(3+) phosphor powders exhibit an emission band peaked at 536 nm when excited at 462 nm. Sr sub(3)Al sub(2)O sub(6):Ce super(3+) sample at the Ce super(3+) concentration of 5 mol% shows the strongest emission intensity. The addition of H sub(3)BO sub(3) has obvious influence on phase and emission intensity of Sr sub(3)Al sub(2)O sub(6):Ce super(3+) phosphors. The results show that the Sr sub(2.95)Ce sub(0.05)Al sub(2)O sub(6) sample with the 7 wt% addition of H sub(3)BO sub(3) has the highest emission intensity and the longest lifetime.