摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a nitride-based phosphor that has a high luminous efficiency, excellent temperature properties and a luminescent color from blue to yellow. <P>SOLUTION: The nitride-based phosphor is activated by cerium, absorbs light from near ultraviolet to blue, emits a yellow light and is represented by general formula M<SB>w</SB>Al<SB>x</SB>Si<SB>y</SB>B<SB>z</SB>N<SB>((2/3)w+x+(4/3)y+z)</SB>:Ce (w, x, y and z are in the following ranges; M is at least one selected from the group consisting of Mg, Ca, Sr and Ba; w, x, y and z are in 0.04≤w≤9, x=1, 0.056≤y≤18 and 0≤z≤0.5). <P>COPYRIGHT: (C)2007,JPO&INPIT |