| abstract |
A method of providing a phosphor with a precisely controlled element composition, a phosphor provided by the same, and a red phosphor represented by the [formula 1] are disclosed, in which n Ca a Sr b Al c Si d O e N f :Eu g [formula 1]n wherein 0≦a<1, 0≦b<1, c=1, 0.8≦d≦1.2, 0≦e≦0.5, 2.5≦f≦3.1, 0.002≦g≦0.020, a and b are not both 0 at the same time; and a CIE1931 chromaticity coordinates (x, y) of a light emitted from the phosphor, which is excited by a wavelength of 455 nm, satisfies the formulae: nn x =[(−0.1059 b 3 +0.068 b 2 −0.06 b )+(2152.8 g 3 −309.2 g 2 +8.2943 g )+0.6324]±0.01;n n y =[(−0.1295 b 3 −0.0968 b 2 0.0702 b )+(−3299.2 g 3 311.08 g 2 −7.9266 g )+0.3621]±0.01.n n The present invention also provides a light emitting device comprising the said red phosphor. |