文摘
Novel single-phase white-light-emitting Ca8MgBi(PO4)7:xDy3+ (x = 0.02, 0.04, 0.06, 0.08, 0.12, 0.20, and 0.30) phosphors for light-emitting diode (LED) applications were synthesized by conventional solid-state reactions, and the phases and luminescent properties were well characterized. The results show that the excited bands of the phosphor are centered at 324 nm (6H15/2 鈫?#xA0;4M17/2), 350 nm (6H15/2 鈫?#xA0;4M15/2, 6P7/2), 366 nm (6H15/2 鈫?#xA0;4I11/2), 387 nm (6H15/2 鈫?#xA0;4I13/2, 4F7/2), 427 nm (6H15/2 鈫?#xA0;4G11/2), and 448 nm (6H15/2 鈫?#xA0;4I15/2) wavelengths. On excitation at 350 nm, the emission transitions of Dy3+ ions consisted of double emission bands, which can be attributed to the 4F9/2 鈫?#xA0;6H15/2 (480 nm) and 4F9/2 鈫?#xA0;6H13/2 (572 nm) transition emissions. The phosphor developed in this study has great potential as a single-component white-light-emitting phosphor for UV-LEDs.