| 简介 |
PROBLEM TO BE SOLVED : To provide a fluorescent substance capable of being excited by a near UV ray-a blue-violet ray, further excited by a near UV ray-a blue ray and showing high brightness.
SOLUTION : The fluorescent substance comprises a base crystal composed of a compound represented by a formula : M1aM2bNc {wherein M1 is one or more kinds of element selected from the group consisting of Mg, Ca, Sr, Ba and Zn; M2 is one or more kinds of element selected from the group consisting of Al, Ga and In and c=(2a/3)+b, 0
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