Hydrothermal Synthesis and Tunable Multicolor Upconversion Emission of Cubic Phase Y₂O₃ Nanoparticles

Figure 2

(a) TEM image of Y(OH)₃:Yb/Er precursor; (b) low-magnification and (c) high-magnification TEM images of Y₂O₃:Yb/Er; (d) the HRTEM image of Y₂O₃:Yb/Er; (e) EDS of the Y₂O₃:Yb/Er nanoparticles (mainly composed of Y, Er, Yb, and O elements).

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