Patent ID: 7067072

Claim:
A nanophase luminescence particulate material having a size less than 100 nm and having the general formula X/Y, wherein X is at least two dopants selected from the group of ion pairs consisting of (Mn,Eu), (Ce,Tb), (Ag,Eu), (Ce,Eu), (Eu,Tb), (Ce,Yb), (Tb,Yb), (Yb,Eu), (Pr,Tm), (Pr,Sm), (Pr,Dy), (Dy,Sm), (Dy,Tm), (Eu 2+ , Eu 3+ ) and (Sm,Tm), and further wherein Y is a nanoparticle host represented by the general formula (M 1−z N z ) x A 1−y B y , wherein M=Zn, Cd or Hg; N=Zn, Cd, Pb, Ca, Ba, Sr, Mg, Hg; A=S, Se, Te, or O; B=S, Se, Te, or O; and wherein 0<x≦1, 0<y≦1, 0<z≦1.