fig2
![Crystalline phase-dependent cations migration in core-shell lanthanide-doped upconversion nanoparticles](https://image.oaes.cc/3deea838-56d1-4d61-90d1-faf23344c412/20236.fig.2.jpg)
Figure 2. In-situ temperature-dependent UCL spectrum of α- (A) and β- (B) NaYF4:10%Er@NaYbF4@NaYF4 UCNPs under 980-nm excitation.
Figure 2. In-situ temperature-dependent UCL spectrum of α- (A) and β- (B) NaYF4:10%Er@NaYbF4@NaYF4 UCNPs under 980-nm excitation.
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