PHOSPHOR, PHOSPHOR-CONTAINING COMPOSITION, LIGHT-EMITTING DEVICE, LIGHTING DEVICE, IMAGE DISPLAY DEVICE, AND METHOD FOR PRODUCING THE PHOSPHOR

Japanese Patent JP2015113358

A

PROBLEM TO BE SOLVED: To provide a LuAG-based phosphor which has high light-emitting characteristics, especially high emission luminance, and hardly causes color unevenness when used for a light-emitting device, and to provide a light-emitting device, an image display device, and a lighting device containing the LuAG-based phosphor and having high quality.SOLUTION: There is provided a phosphor represented by following formula [1], produced via a step of firing a phosphor raw material, where QD of the phosphor after the step of firing the phosphor raw material is 0.31 or less. LuACeAlMO[1] (in the formula, A represents an element including one or two or more kinds selected from a group consisting of Y, Gd, Tb, and La; M represents an element including Ga or Sc; and a, b, c, d, and e are values in the following ranges, respectively: 1≤a≤3, 0≤b<1.5, 0