| abstract |
A phosphor represented by a general formula: MeaRebSicAldNeOf is provided. Me comprises Sr as an essential element and comprises one or more elements selected from Na, Li, Mg, Ca, Ba, Sc, Y and La. Re comprises Eu as an essential element and comprises one or more elements selected from Mn, Ce, Tb, Yb and Sm. Furthermore, provided that a=1-x, b=x, c=(2+2p)*(1-y), d=(2+2p)*y, e=(1+4p)*(1-z)and f=(1+4p)*z, parameters p, x, y and z are 1.620 < p < 1.635, 0.005 < x < 0.300, 0.200 < y < 0.250, 0.070 < z < 0.110. A high-brightness light-emitting device is provided by using the phosphor. |