Fig. 4From: Hydrothermal Synthesis and Upconversion Properties of About 19 nm Sc2O3: Er3+, Yb3+ Nanoparticles with Detailed Investigation of the Energy Transfer MechanismFTIR spectra of HT-Sc2O3: 1%Er3+, 5%/10%Yb3+ (a) and ST-Sc2O3: 1%Er3+, 5%Yb3+/10%Yb3+ (b) samplesBack to article page