Synthesis and luminescent properties of UV-excited thermal stable red-emitting phosphor Ba_3Lu(PO_4)_3: Eu~(3+) for NUV LED

摘要

A series of Ba_3Lu(PO_4)_3: Eu~(3+) phosphors were synthesized by high-temperature solid-state method, and their UV-vis luminescent properties were investigated. The f-f transitions of Eu~(3+) in the host lattice were assigned and discussed. The excitation and emission spectra indicate that this phosphor can be excited by near ultraviolet (NUV) light, and exhibits strong red emission. The concentration quenching on Eu~(3+) emission and its mechanism were investigated. This phosphor shows a good thermal stability at high temperature (～180℃). The fabricated prototype LEDs with Ba_3Lu(PO_4)_3: Eu~(3+) and 395 nm-emitting InGaN chips exhibit bright red emission. The present study suggests that Ba_3Lu(PO_4)_3: Eu~(3+) can be a potential red phosphor for NUV lieht-emittine diodes.