Fig. 6From: Hydrothermal Synthesis and Upconversion Properties of About 19 nm Sc2O3: Er3+, Yb3+ Nanoparticles with Detailed Investigation of the Energy Transfer MechanismNear-infrared emission spectra in the range of 1000–1700 nm for HT-Sc2O3: x%Er3+, 10%Yb3+ (x = 0, 0.5, 1, 2) (a) and HT-Sc2O3: 1%Er3+, y%Yb3+, (y = 0, 5, 10, 15) (b) under 980 nm excitationBack to article page