A Novel Green-Emitting Phosphor BaZnP/sub 2/O/sub 7/:Tb/sup 3+/ for White Leds and the Infuence of Doping Ce/sup 3+/

The BaZnP₂O₇:Tb³⁺ phosphor was synthesized by high temperature solid state reaction and an efficient green emission under near-ultraviolet was observed. The X-ray diffraction pattern indicates that pure BaZnP₂O₇:Tb³⁺ phosphor was obtained. The emission spectrum shows the most intense peak is located at 547 nm, which corresponds to the ⁵D₄rarr⁷F₅ transition of Tb³⁺. The excitation spectrum is extending from 300 to 400 nm, which is coupled well with the emission of UV LED (370-420 nm). The BaZnP₂O₇:Tb³⁺ is a potential green-emitting phosphor for white LEDs. The BaZnP₂O₇ doped with Ce³⁺ or double doped with Tb³⁺ and Ce³⁺ were also prepared and the effect of co-doped Ce on the emission intensity of BaZnP₂O₇:Tb³⁺ phosphor was investigated.