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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Revisiting the Enhanced Red Upconversion Emission from a Single β-NaYF4:Yb/Er Microcrystal By Doping with Mn2+ Ions

Fig. 3

a UC emission spectra from a single β-NaYF4:Yb/Er/Mn (20/2/10 mol%) microcrystal irradiated with different excitation intensities. b The UC emission intensity ratios for a single β-NaYF4:Yb/Er/Mn (20/2/10 mol%) microcrystal as a function of the excitation intensities. c The dependence of the UC emission intensity on the excitation intensity for a single β-NaYF4:Yb/Er/Mn (20/2/10 mol%) microcrystal

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