| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fluorophor subject to excitation by an excitation light source with ultraviolet to visible ray region and having luminescent color in a bluish green-color to green-color region subject to wavelength conversion. <P>SOLUTION: The oxynitride fluorophor is such that at least one rare earth element with Eu as the essential element is used as an activator R, essentially containing at least one groupII element with Ba as the essential element selected from the group consisting of Ca, Sr, Ba and Zn, and at least one groupIV element with at least Si as the essential element selected from the group consisting of C, Si, Ge, Sn, Ti, Zr and Hf. In this fluorophor, the molar ratio: the groupII element to R is (1:0.005) to (1:0.15). <P>COPYRIGHT: (C)2004,JPO&NCIPI |
