| 摘要 |
Disclosed is a novel phosphor having wide half bandwidth, which emits fluorescence containing much red component. Specifically, the phosphor contains a crystal phase represented by the following formula [I]. R<SUB>3-x-y-z+w2</SUB>M<SUB>z</SUB>A<SUB>1.5x+y-w2</SUB>Si<SUB>6-w1-w2</SUB>Al<SUB>w1+w2</SUB>O<SUB>y+w1</SUB>N<SUB>11-y-w1</SUB> [I] (In the formula, 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; and x, y, z, w1 and w2 each represents a number satisfying the following relations: (1/7) = (3-x-y-z+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, and 0 = w1 + w2 = 5.) |
