| abstract |
The present embodiments provide a europium-activated oxynitride phosphor and a production method thereof. This phosphor emits red luminescence having a peak at 630 nm or longer and can be produced by use of inexpensive oxides as raw materials containing alkaline earth metals such as strontium. The oxynitride phosphor is activated by a divalent europium and represented by the formula (1): n n (M 1-x Eu x )Al a Si b O c N d C e (1). n nIn the formula, M is an alkaline earth metal, and x, a, b, c, d and e are numbers satisfying the conditions of 0<x<0.2, 1.3≤a≤1.8, 3.5≤b≤4, 0.1≤c≤0.3, 6.7≤d≤7.2 and 0.01≤e≤0.1, respectively. |