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. 2017 Dec 11;7:17325. doi: 10.1038/s41598-017-17567-9

Figure 4.

Figure 4

Emission spectra under electron beam excitation. CL spectra (a) of undoped Y2O3 thin film at RT and at 77 K and (b) of Bi doped Y2O3 thin film at RT under electron beam excitation at 3 keV and 5 nA. The intensities reported in the two panels are directly comparable. Figure 4 (b) reports also the PL emission spectra from Bi ions in the two sites from the same sample at RT.