Phosphors containing phosphate and/or borate of metals of group IIIA, group IVA, and lanthanide series, and light sources incorporating the same
A phosphor comprises an oxide that comprises: (a) at least an element selected from the group consisting of phosphorus and boron; (b) at least a metal selected from the group consisting of elements of Group IIIA, elements of Group IVA, and elements of the lanthanide series; which oxide is co-activated with Ce3+ and Tb3+. In one embodiment, a phosphor comprises lanthanum and gadolinium phosphate and/or borate co-activated with cerium and terbium. A phosphor of the present invention has low emission of UV radiation having wavelengths longer than about 250 nm, thus efficiently uses exciting UV having shorter wavelengths. The phosphor is used in light source that comprises a UV radiation source to convert efficiently UV radiation to visible light.
General Electric Company
H H C
H01J H01J C09K
inventional inventional inventional
Alok Mani William Winder Holly Ann
Srivastava Beers Comanzo