Luminescence characteristics of LiCaBO3:Tb3+ phosphor for white LEDs

A novel green phosphor, LiCaBO3:Tb3+, was synthesized by solid state reaction method, its luminescence characteristics were investigated, and the formation of phosphors were confirmed by X-ray powder diffraction (XRD). Its excitation band extended from 220 to 400 nm, which was coupled well with the emission of UV LED (350–410 nm). It exhibited a strong green emission located at 544 nm with chromatic coordination (0.25, 0.58). The emission intensities of LiCaBO3: Tb3+ phosphor were influenced by varying Tb3+ concentration, moreover, could be enhanced by doping charge compensator Li+, Na+, and K+.