Controlled Synthesis of Water-Soluble NaYF4:Yb3+, Er3+ Nanoparticles with Surfactant Dependent Properties
Figure 6
Upconversion luminescence spectra of the dried power NaYF4:Yb3+, Er3+ samples prepared with different solvothermal conditions according to Table 1 ( = 980 nm, power = 760 mW): (a) LPEI, 3 h; (b) LPEI, 5 h; (c) HPEI, 3 h; (d) HPEI, 5 h.
