| 摘要 |
A phosphor includes a composition represented by (Sr (1-x-y) Ca x Ba y ) (Ga (1-m-n) Al m In n ) a S 4 :Eu, wherein the concentration of europium is in the range of 1 to 9 mole percent; 0 ‰¤ x ‰¤ 1, 0 ‰¤ y ‰¤ 1, and x + y ‰¤ 1; 0 ‰¤ m ‰¤ 1, 0 ‰¤ n ‰¤ 1, and m + n ‰¤ 1; and a main absorption wavelength range of the excitation is selected either a first wavelength range that overlaps the entirety of a reference wavelength range and extends to the shorter wavelength side or a second wavelength range that overlaps the entirety of the reference wavelength range and extends to the longer wavelength side according to value a. |
