PHOSPHOR AND VACUUM ULTRAVIOLET RAY EXITED LUMINESCENT ELEMENT

摘要

A phosphor which comprises at least one metal element M<1 >selected from the group consisting of Ca, Sr and Ba, at least one metal element M<2 >selected from the group consisting of Y, La, Gd and Lu, at least one metal element M<3 >selected from the group consisting of Si and Ge, a metal oxide containing oxygen, and, as an activating agent, at least one metal element Ln<1 >selected from the group consisting of Ce, Pr, Nd, Pm, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Mn; and a vacuum ultraviolet ray excited luminescent element comprising the phosphor. The phosphor is exited with a vacuum ultraviolet ray and exhibits high brightness.