Patent ID: 8703018

Claim:
A red phosphor comprising: an element A, europium (Eu), silicon (Si), aluminum (Al), oxygen (O), and nitrogen (N) at the atom number ratio of the composition formula (1) [A( m−x )Eu x ]Si 9 Al y O n N [12+y−2(n−m)/3] Composition Formula (1); and Carbon, wherein the amount of carbon ranges from about 0.05 to about 0.08 wt %, the element A in the composition formula (1) is at least one of magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), and m, x, y, and n in the composition formula (1) satisfy the relations 4.5<m<5, 0<x<1, 0<y<2, and 0<n<10, and wherein the compound of the composition formula (1) has a crystal structure that belongs to an orthorhombic system spatial point group Pmn2 1 .