| abstract |
A phosphor having a high luminous intensity 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 composition ratio a, b, c, d, e and f are given as 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 1.630 < p < 1.650, 0.005 < x < 0.300, 0.180 < y < 0.220, 0.060 < z < 0.100. A high-brightness light-emitting device is provided by using the phosphor. |