| abstract |
The present invention provides a new phosphor having a wide half-value width in which emitted fluorescence contains a large amount of a red component. A phosphor includes a crystal phase represented by the formula [I]. R 3-xy-z + w2 M z A 1.5x + y-w2 Si 6-w1-w2 Al w1 + w2 O y + w1 N 11-y-w1 [I] (R represents La, Gd, Lu, Y and / or Sc, M represents Ce, Eu, Mn, Yb, Pr and / or Tb, A represents Ba, Sr, Ca, Mg and / or Zn. , X, y, z, w1, and w2 represent numerical values in the following ranges. (1/7) ≦ (3-x−yz + w2) / 6 <(1/2) 0 <(1.5x + y−w2) / 6 <(9/2) 0 <x <3 0 ≦ y <2 0 <z <1 0 ≦ w1 ≦ 5 0 ≦ w2 ≦ 5 0 ≦ w1 + w2 ≦ 5) [Selection figure] None |