Patent ID: 7575697

Claim:
A silicate-based green phosphor having the formula (Sr,A 1 ) x (Si,A 2 )(O,A 3 ) 2+x :Eu 2+ , where: A 1 is at least one of a divalent 2+ alkaline earth or transition metal cation selected from the group consisting of Mg, Ca, Ba, and Zn, wherein the stoichiometric amount of A 1 varies from 0.3 to 0.8, both inclusive; A 2 is P; A 3 is a halogen selected from the group consisting of F and Cl; wherein the amounts of A 2 and A 3 each range from 0 to 19 mole percent, both endpoints inclusive; and x is any value between 1.5 and 2.5, both values inclusive, subject to the proviso that x is not 2.