Figure 3From: Color-tunable up-conversion emission in Y2O3:Yb3+, Er3+ nanoparticles prepared by polymer complex solution methodUC spectra of NPs for all dopant compositions and photograph of pellets prepared from UCNPs. (a) UC spectra of Y1.97Yb0.02Er0.01O3 (green line), Y1.94Yb0.05Er0.01O3 (yellow line), and Y1.89Yb0.10Er0.01O3 (red line) NPs. (b) Photograph of pellets prepared from UCNPs with different Yb3+ concentrations taken under 978-nm excitation.Back to article page