Fig. 3From: Hydrothermal Synthesis and Upconversion Properties of About 19 nm Sc2O3: Er3+, Yb3+ Nanoparticles with Detailed Investigation of the Energy Transfer MechanismUCL spectra of Sc2O3: 1%Er3+, 10%Yb3+ (a) and Sc2O3: 1%Er3+, 5%Yb3+ (b) samples prepared by HT and ST methods, respectively, pumped under 980 nm excitation. The insets present the digital photographs of corresponding samplesBack to article page