Patent ID: 8801970

Claim:
A phosphor of formula: M 1 ′ a′ Sr b′ Ca c′ M 2 ′ d′ Al e′ Si f′ N g′ wherein a′, b′, c′, d′, e′, f′, and g′ satisfy: 0.00001≦a′≦0.15; 0.6≦b′≦0.99999; 0≦c′<1; 0≦d′<1; a′+b′+c′+d′=1; 0.5≦e′≦1.5; 0.5≦f′≦1.5; and 2.5≦g′≦3.5; M 1 ′ is Eu; M 2 ′ is Mg, Ba, or both; at least 85 mol % of M 1 ′ is Eu 2+ ; the phosphor has a peak emission wavelength of from 590 nm to 650 nm; and the phosphor comprises oxygen in an amount of 5 wt % or less.