According to one aspect of the present invention, the phosphor has {HEAD ~ a formula} of {TAIL ~ PO4}; wherein 0<x, y<1; 0<x+y+z<1; and 0.3<z <1 
According to one aspect of the present invention , the phosphor has { HEAD ~ a formula } of { TAIL ~ PO4 } ; wherein 0 < x , y<1 ; 0 < x+y+z<1 ; and 0.3 < z < 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH