Luminescent property of a novel green emitting phosphor Sr_3Bi(PO_4)_3:Tb~(3+)

摘要

A novel green phosphor Sr_3Bi(PO_4)_3:Tb~(3+) is synthesized by a high temperature solid-state method at 1250 ℃ in air, and its luminescent property is investigated. The powder X-ray diffraction patterns of Sr_3Bi(PO_4)_3:Tb~(3+) indicate a similarity crystalline phases to Sr_3Bi(PO_4)_3. Sr_3 Bi(PO_4)_3:Tb~(3+) shows green emission under the 376 nm radiation excitation, and the prominent luminescence in green (543 nm) due to the ~5D_4–~7F_5 transition of Tb~(3+). For the 543 nm emission, the excitation spectrum has several excitation bands, and the strongest excitation peak locates at 376 nm. The emission intensities of Sr_3Bi(PO_4)_3:Tb~(3+) can be influenced by the Tb~(3+) doping concentration, and can be achieved the maximum at 0.1 mol Tb~(3+). Moreover, the concentration quenching effect of Tb~(3+) in Sr_3Bi(PO_4)_3 can be observed. The CIE color coordinate of Sr_3Bi(PO_4)_3:0.1Tb~(3+) is (0.299, 0.542).