| abstract |
Disclosed are phosphor compositions having the formulas Ca1-a-b CeaEubAl1+aSi1-aN3, where 0<a ≤0.2, 0≤b≤0.2; Ca1-c-dCecEudAl1-c(Mg,Zn)SiN3, where 0<c≤0.2, 0≤d≤0.2; Ca1-2e-fCee(Li,Na)eEUfAlSiN3 where 0≤e≤0.2, 0≤f≤0.2, g+h>0; and Ca1-g-h-iCeg(Li,Na)hEUiAI1+g-hSi1-g+hN3 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. |