Luminescence property of Sm~(3+)-doped Ca_(10)K(PO_4)_7 red phosphor

摘要

A series of Ca_(10-2x)K_(1+x)Sm_x (PO_4)_7 (x = 0-0.06) powders have been fabricated with solid state reaction methods and their luminescence property is studied for the first time. X-ray diffractometry analysis indicates that the synthesised powders are all single phase Ca_(10)K(PO_4)_7 with rhombohedral structure and the doped Sm~(3+) ions have not caused any significant change in the host structure, indicating Sm~(3+) ions are incorporated into the Ca_(10)K(PO_4)_7 structure. Scanning electron microscopy micrograph indicates that powders have uniform granular morphology with an average particle size about 250-500 nm that decreases with increasing Sm~(3+) concentration. The synthesised powders show red emissions at 563.8 nm, 604.0nm, and 649.2 nm that reaches maximal intensity at Sm~(3+) concentration of 3 at.%.