| abstract |
An object of the present invention is to improve the durability of a phosphor. [Solution] At 25 ° C., the spin concentration of a signal of g = 2.00 ± 0.02 detected by electron spin resonance measurement is 3 × 10 −9 mol or less per 1 g of the phosphor, and the following formula [I] A phosphor containing a crystalline phase having a chemical composition represented. M 1 x Ba y M 2 z L u O v N w [I] (In the above formula [I], M 1 is Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, At least one type of activation element selected from the group consisting of Ho, Er, Tm and Yb; M 2 represents at least one divalent metal element selected from Sr, Ca, Mg and Zn, L represents a metal element selected from metal elements belonging to Group 4 or Group 14 of the periodic table, x, y, z, u, v, and w are numerical values in the following ranges, respectively. 0.00001 ≦ x ≦ 3 0 ≦ y ≦ 2.99999 2.6 ≦ x + y + z ≦ 3 0 <u ≦ 11 6 <v ≦ 25 0 <w ≦ 17) [Selection] Figure 4 |