Core/shell multifunctional magnetic nanophosphor having core/shell structure and synthetic method thereof

A nanophosphor, comprising:

• a core which comprises nanoparticles comprising a second compound of Formula 2, and
• a shell which comprises a first compound and covers the core, wherein the first compound is fluoride-based which is co-doped with Ce3+ and Tb3+,
• NaGd1−p−q−rMrF4:Ce3+p,Tb3+q (1)
• wherein, p is a real number in the range of 0.01≦p≦0.5;
• q is a real number in the range of 0.001≦q≦0.35;
• r is a real number in the range of 0≦r<1;
• 0.011≦p+q+r<1;
• and p>q;
• M is selected from the group consisting of Y, La, Pr, Nd, Pm, Sm, Eu, Dy, Ho, Er, Tm, Yb, Lu, and combination thereof,
• wherein the second compound is fluoride-based which is co-doped with Yb3+ and Er3+,
• NaY1−w−z−x−yGdwLzF4:Yb3+x,Er3+y (2)
• wherein, x is a real number in the range of 0.1≦x≦0.9;
• v is a real number in the range of 0<y≦5 0.1;
• and 0.1<x+y≦1;
• w is a real number in the range of 0≦w≦1;
• z is a real number in the range of 0≦z≦1;
• and 0.1<x+y+w+z≦1;
• and
• L is selected from the group consisting of lanthanide elements and combination thereof.