fig3
![Crystalline phase-dependent cations migration in core-shell lanthanide-doped upconversion nanoparticles](https://image.oaes.cc/3deea838-56d1-4d61-90d1-faf23344c412/20236.fig.3.jpg)
Figure 3. Decay curves at 407 (A); 540 (B); and 651 nm (C) for α-NaYF4:10%Er@NaYbF4@NaYF4 UCNPs before and after annealing at 200 °C for 4 h.
Figure 3. Decay curves at 407 (A); 540 (B); and 651 nm (C) for α-NaYF4:10%Er@NaYbF4@NaYF4 UCNPs before and after annealing at 200 °C for 4 h.
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