RARE EARTH DOPED LUMINESCENT MATERIAL

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A luminescent material includes an aluminate phosphor of formula I A1+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.