| 摘要 |
<p>Provided are a surface treated phosphor having high dispersibility and remarkably improved moisture resistance without degradation in fluorescence properties, and a method of producing the surface treated phosphor. The present invention relates to a surface treated phosphor including: a phosphor matrix including an alkaline earth metal and silicon; and a surface treatment layer including an alkaline earth metal, silicon, and a specific element belonging to groups 4 to 6 of the periodic table, wherein, when element distribution of the surface treatment layer in the thickness direction viewed in cross-section is determined by electron microscopy and energy dispersive X-ray spectroscopy coupled with the electron microscopy, the position representing the maximum peak of a specific element content is located closer to the surface than the position representing the maximum peak of a silicon content and silicon contents of the phosphor matrix and the surface treatment layer satisfy the following formula (1):
[Formula 1]
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒS 1 < S 2 €ƒ€ƒ€ƒ€ƒ€ƒ(1)
wherein S 1 represents the silicon content of the phosphor matrix and S 2 represents the silicon content of the surface treatment layer.</p> |
