Research Article
Upconversion Luminescence Properties of Y2O3:Yb, Er and Y2O2S:Yb, Er Nanoparticles Prepared by Complex Precipitation
Figure 3
Upconversion spectra of the Er3+ (0.8 mol%), Yb3+ (0–11 mol%) codoped Y2O3 samples calcined at 900°C when excited by 980 nm LD.