A Red-Emitting Phosphor and Its Luminescent Properties

Under 616 nm monitoring, excitation peaks at 395, 465, and 535 nm were observed for the red-emitting phosphor Li0.3Y0.82Mo0.1W0.9O4+delta : 0.08Eu(3+) (LYMW), which was synthesized using the solid-state method. Particularly in the range of 250 to 420 nm, excited peaks can be assigned to the transitions of O-2(-)-->Mo6+/W6+/Eu3+ and four sharp peaks can be assigned to the 4f-4f transition of Eu3+ (similar to 360 nm from the F-7(0)-->D-5(4) transition, similar to 380 nm from the F-7(0)-->L-5(7) transition, similar to 395 nm from the F-7(0)-->L-5(6) transition, and similar to 415 nm from the F-7(0)-->D-5(3) transition).