| 摘要 |
PROBLEM TO BE SOLVED: To provide a phosphor material having high luminous efficacy and hardly reducing luminance even at a high temperature.SOLUTION: The phosphor material according to an aspect of the disclosure contains a main component represented by ABCEuSmLnWO. A is one or more kinds of element selected from a group consisting of an alkali earth metal element and mainly contains Ca. B is one or more kinds of element selected from a group consisting of bivalent metal element and mainly contains Mg. C is one or more kinds of element elected from a group consisting of alkali metal elements and mainly contains Li, Na or Li and Na. Ln is one or more kinds of element selected from a group consisting of a rare earth element excluding Eu and Sm. w, x, y and z satisfy 0.05≤w≤0.25, 0.05≤x+y≤0.25, 0.0≤y≤0.02 and w=x+y+z.SELECTED DRAWING: None |
