| 摘要 |
Disclosed are phosphor compositions having the formulas Ca<SUB>1-a-b</SUB>Ce<SUB>a</SUB>Eu<SUB>b</SUB>Al<SUB>1+a</SUB>Si<SUB>1-a</SUB>N<SUB>3</SUB>, where 0<a<=0.2, 0<=B<=0.2; CA<SUB>1-c-d</SUB>Ce<SUB>c</SUB>Eu<SUB>d</SUB>Al<SUB>1-c</SUB>(Mg,Zn)<SUB>c</SUB>SiN<SUB>3</SUB>, where 0 c<=0.2, 0<=D<=0.2; CA<SUB>1-2e-f</SUB>Ce<SUB>e</SUB>(Li,Na)<SUB>e</SUB>Eu<SUB>f</SUB>AlSiN<SUB>3</SUB>, where 0 <=e<=0.2, 0<=f<= 0.2 , g+h> 0 ; and Ca<SUB>1-g-h-i</SUB>Ce<SUB>g</SUB>(Li,Na)<SUB>h</SUB>Eu<SUB>i</SUB>Al<SUB>1+g-h</SUB>Si<SUB>1-g+h</SUB>N<SUB>3 </SUB>where 0<=g<=0.2, 0<h<=0.4, 0<=i<=0.2,g+i>0. When combined with radiation from a blue or UV light source, these phosphors can provide light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above phosphors and additional phosphors.
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