Patent ID: 8808578

Claim:
A red phosphor containing an element A, europium (Eu), silicon (Si), carbon (C), oxygen (O) and nitrogen (N) in ratios of the numbers of atoms of the following compositional formula (1): [Chemical Formula 6] [A (m-x) Eu x ][Si (9-y) C y ]O n N [12-2(n-m)/3] compositional formula (1) where the element A is at least one of magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba), and where m, x, y and n in the compositional formula (1) satisfy the relationships of 3<m<5, 0<x<1, 0<y<9 and 0<n<10, wherein the ratio of the intensity of a peak existing at a position of the diffraction angle of 36.0° to 36.6° to that at a position of the diffraction angle of 35.0° to 36.0° in an X-ray diffraction pattern is 0.58 or higher.