| abstract |
The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by the following formula (1) n [Formula 1] n formula: (Sr 1-x , Eu x ) α Si β Al γ O δ N ω (1)n n (wherein x is 0<x<1, α is 0<α≦4 and β, γ, δ and ω are numbers such that converted numerical values when α is 3 satisfy 9<β≦15, 1≦γ≦5, 0.5≦δ≦3 and 10≦ω≦25), and the sialon crystal includes at least one non-Eu rare earth element selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in a proportion of 0.1% by mass or more and 10% by mass or less, and the phosphor emitting green light by being excited by ultraviolet light, violet light or blue light. |