Rare earth doped luminescent material
A luminescent material includes an aluminate phosphor of formula IA1+xMg1+yAl10+zO17+x+y+1.5z:Eu2+, R3+, where 0≦x≦0.4, 0≦y≦1 and 0≦z≦0.2.A is selected from Ca, Ba, and Sr and combinations thereof. The aluminate phosphor is doped with a rare earth ion (R3+), which exists in stable multi-valence states in the luminescent material. R3+ is selected from the group consisting of Sm3+, Yb3+, Tm3+, Ce3+, Tb3+, Pr3+ and combinations thereof. Phosphors of formula I may be blended with other blue, yellow, orange, green, and red phosphors to yield white light phosphor blends. A lighting apparatus including such a luminescent material is also presented. The light apparatus includes a light source in addition to the luminescent material.
General Electric Company
H C Y
H01J C09K Y02B
inventional inventional additional
Alok Mani Katalin Nagaveni Swarnagowri László Holly Ann William Winder Gopi Chandran István Károly
Srivastava Toth Karkada Addepalli Balázs Comanzo Beers Ramachandran Deme