Single-phase full-color Ba3Lu2(SiO4)3:Eu2+ phosphor for white-light emitting diodes

We developed a new silicate-based full-color phosphor Ba3Lu2(SiO4)3:Eu2+ through solid state reaction. The host crystal structure was isostructural with Ca3Y2(SiO4)3 instead of garnet-type. The phosphor absorbed near-ultraviolet light from 250 to 400 nm, which was very suitable for a color converter of white LED that used UV-LED as the primary light source. The photoluminescence peak wavelength of Ba3Lu2(SiO4)3:Eu2+ was about 461 nm and a shoulder peak was around 522 nm, which resulted from the 5d-4f transition of the Eu2+. The optimum concentration of Eu2+ was 3.45 mol.% of Ba2+ content in Ba3Lu2(SiO4)3 host. It is a promising candidate for application in white LED as a white light converter.