Preparation and luminescence properties of orange-red Ba3Y4O9:Sm3+ phosphors

A new orange-red emitting phosphor Ba3Y4O9:Sm3+ was synthesized. The excitation spectrum includes a series of linear peaks at 350, 367, 382, 410, 424, 445, 470 and 495 nm, respectively. Under 410 nm excitation, the emission peaks were located at 574 nm, 608 nm, 659 nm and 722 nm, respectively. The phosphor exhibits orange-red emission and can be effectively excited by near-UV LED chips.198