Figure 8
(a) The 2.7 μm emission of xEr3+ (x = 0, 0.01, 0.03, 0.05, 0.10 mol) doped YOF nanocrystals sintered at 600 °C for 3 h. (b) The 2.7 μm emission of 0.05 mol Er3+ doped YOF nanocrystals sintered at different temperatures for 3 h. (c) Raman spectra of undoped YOF precursor sintered at different temperatures for 3 h. (d) The integrated IR emission intensity from 2550 to 2900 nm of GdOF:0.05Er3+ and YOF:0.05Er3+ versus the calcination temperatures. (e,f) The fluorescence decay curves of the Er3+: 4I11/2 level (1007 nm) and 4I13/2 level (1530 nm) corresponding to 0.05 mol Er3+ doped YOF nanocrystals sintered at different temperatures for 3 h, respectively.
