A Novel Blue-green-emitting Phosphor LiBaPO4:Eu2+ for White Light-emitting Diodes

Abstract A novel efficient blue-green-emitting phosphor, LiBaPO4:Eu2+, was prepared by solid-state reaction method. Its excitation band is extending from 250 to 450 nm, which is adaptable to the emission band of near-ultraviolet (NUV) LED chips (350–420 nm). Upon 348-nm light excitation, the phosphor exhibits a strong blue-green emission peaking at 480 nm. A bright blue-green LED was fabricated by incorporating the phosphor with an InGaN-based NUV chip. All the characteristics suggest that LiBaPO4:Eu2+ is a good blue-green phosphor candidate for creating white light in phosphor-converted white LEDs.