Research Article
Silica Nanoparticle Coating of NaYF4:(Yb3+, Er3+) Upconversion Phosphor
Figure 5
(a) PL spectra in the visible region for the NaYF4:(Yb3+, Er3+) phosphors coated with SiO2 at several concentrations. (b–e) Peaks denoted by A, B, C, D, and E in (a).
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