| abstract |
A white light emitting diode (LED) device includes a blue LED light source, a sealant material, a green phosphor material, and an orange phosphor material. The sealant material covers the blue LED light source. The green phosphor material distributed in the sealant material includes (Lu 1-x-y-a-b Y x Gd y ) 3 (Al 1-z Ga z ) 5 O 12 :Ce a Pr b , wherein 0≦x≦1, 0≦y≦1, 0≦z≦0.1, 0≦a≦0.2, and 0≦b≦0.1. The orange phosphor material, which is also distributed in the sealant material, include the compound A, the compound B, or both. The compound A is (Sr 1-x-y-z Ca x Ba y Mg z ) 2 SiO 4 :Eu w , wherein 0≦x≦1, 0≦y≦1, 0≦z≦1, and 0.03≦w≦0.2. The compound B is (M1) x (M2) y (Si,Al) 12 (O,N) 16 , wherein M1 represents Li, Mg, Ca, or Y, M2 represents Ce, Pr, Eu, Tb, Yb, or Er, 0.05≦x+y≦1.5, and 0≦y≦0.7. |