SURFACE-TREATED FLUORESCENT BODIES AND PROCESS FOR PRODUCTION OF SURFACE-TREATED FLUORESCENT BODIES

摘要

The present invention aims to provide a surface-treated phosphor having high dispersibility and capable of significantly enhancing moisture resistance without deteriorating the fluorescence properties, and a method for producing the surface-treated phosphor. The surface-treated phosphor includes: a phosphor body; and a surface treatment layer containing at least one specific element selected from elements of the third to sixth groups of the periodic table, and fluorine, the phosphor body having the surface treatment layer on the surface thereof, wherein, when a cross section of the surface treatment layer is subjected to a thickness-wise elemental distribution analysis by a combination of an electron microscopic analysis and an energy-dispersive X-ray element analysis, a peak indicating the maximum content of the specific element appears nearer to the surface than a peak indicating the maximum fluorine content.