| abstract |
The invention is a phosphor which includes a phosphor material having a composition represented by a general formula: M(0) a M(1) b M(2) x-(vm+n) M(3) (vm+n)-y O n N z-n , wherein M(0) is one or more elements selected from Li, Na, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Gd and Lu; M(1) is one or more activators selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb; M(2) is one or more elements selected from Si, Ge, Sn, Ti, Hf and Zr; M(3) is one or more elements selected from Be, B, Al, Ga, In, Tl and Zn; O is oxygen; N is nitrogen; and an atomic ratio of M(0), M(1), M(2), M(3), O and N is adjusted to satisfy the following: x, y and z satisfy 33¤x¤51, 8¤y¤12 and 36¤z¤56; a and b satisfy 3¤a+b¤7 and 0.001¤b¤1.2;m and n satisfy 0.8·me¤m¤1.2·me and 0 ¤n¤7 in which me=a+b; and v satisfies v={a·v(0)+b· v(1)}/(a+b) (wherein v(0) is a valence of M(0) ion and v(1) is a valence of M(1) ion). The invention also relates to a method for producing the phosphor and a light-emitting device using the phosphor. |