A new red phosphor LaNb0.70V0.30O4:Eu3+ for white light-emitting diodes

A series of new red phosphors, La1−xNb0.70V0.30O4:Eu3+x (x = 0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, and 0.40), was synthesized by solid-state reaction method, and their excitation and emission spectra were measured. The La0.70Nb0.70V0.30O4:Eu3+0.30 phosphors can be efficiently excited by a ultraviolet (UV) (395 nm) source, which is coupled with the characteristic emission (350–400 nm) from UV LED (light-emitting diode). The phosphor showed intense red emission at 616 nm with good Commission internationale (CIE) chromaticity coordinates (x = 0.660 and y = 0.340), which are close to the National Television Standard Committee standard values. Meanwhile, the LED was fabricated with the La0.70Nb0.70V0.30O4:Eu3+0.30 phosphors, which can efficiently absorb ∼400 nm irradiation and emit red light. Therefore, La0.70Nb0.70V0.30O4:Eu3+0.30 may find application for near UV InGaN chip-based white LEDs.