Phosphor

Abstract

A phosphor having an elemental composition represented by the following composition formula: SryMg(1−x)MxAlzO(1+y+1.5z) (1), in the formula (1), M represents at least one metal element selected from the group consisting of manganese, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, thulium, and ytterbium, x represents a value of 0.01≤x≤0.8, y represents a value of 1≤y≤2, and z represents a value of 10≤z≤22, wherein a particle diameter D10 at which a cumulative frequency is 10% and a particle diameter D90 at which a cumulative frequency is 90% in a volume-based cumulative particle diameter distribution curve obtained by a laser diffraction scattering method satisfy the following conditions (I) and (II): (I) D90-D10 is less than 67.4 μm; and (II) D10 is a value of greater than 1.3 μm and 100 μm or less.

Dependencies are inferred from the claim text.