| abstract |
A phosphor includes a composition represented by the formula: (M 2 x , M 3 y , M 4 z ) m M 1 O 3 X (2/n) , wherein M 1 is Si and may include at least one element selected Ge, Ti, Zr, and Sn; M 2 is Ca and may include at least one element selected Mg, Ba, and Zn; M 3 is Sr and may include at least one element selected from the group consisting of Mg, Ba, and Zn; X is at least one kind of halogen element; M 4 is Eu 2+ and may includes at least one element rare-earth elements and Mn, wherein m is in a range of 6/6≦m≦8/6; n is in a range of 5≦n≦7; and x, y, and z satisfies x+y+z=1, where 0<x<1, 0<y<1, and 0.01≦z≦0.3. |