Synthesis, Tunable Multicolor Output, and High Pure Red Upconversion Emission of Lanthanide-Doped Lu₂O₃ Nanosheets

Figure 3

(a) UC spectra of Lu₂O₃:Yb/Er, (b) CIE chromaticity coordinates diagram of Lu₂O₃:Yb/Er, (c) UC spectra of Lu₂O₃:Yb/Ho, and (d) CIE chromaticity coordinates diagram of Lu₂O₃:Yb/Ho; the right insets of (a) and (c) are the corresponding digital photographs of 1 wt% water soluble of the samples.

(a)

(b)

(c)

(d)