Efficient Color Tuning of Upconversion Luminescence from Core-Shell Oxysulfide Nanoparticles

<div>TEM images of (a) the precursor of the core NPs (Y(OH)CO3:12% Er3+), (b) the precursor of the core-shell NPs (Y2O3:Er3+@Y(OH)CO3:Yb3+, Ho3+), and (c) the final products of Y2O2S: Er3+@Y2O2S:Yb3+,Ho3+ NPs.</div>

Journal of Nanomaterials

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Figure 2

Figure 2: Efficient Color Tuning of Upconversion Luminescence from Core-Shell Oxysulfide Nanoparticles 