Under 616 nm monitoring, excitation peaks at 395, 465, and 535 nm were observed for the red-emitting phosphor Li0.3Y0.82Mo0.1W0.9O4+δ: 0.08Eu3+ (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 O2-→Mo6+/W6+/Eu3+ and four sharp peaks can be assigned to the 4f–4f transition of Eu3+ (∼360 nm from the 7F0→5D4 transition, ∼380 nm from the 7F0→5L7 transition, ∼395 nm from the 7F0→5 L6 transition, and ∼415 nm from the 7F0→5D3 transition).
Fa-Bin Cao, Yong-Jie Chen, Yan-Wen Tian, and Lang-Kai Li, "A Red-Emitting Phosphor and Its Luminescent Properties," Appl. Spectrosc. 64, 241-243 (2010)