Figure 13
From: Phase Transformation and Intense 2.7 μm Emission from Er3+ Doped YF3/YOF Submicron-crystals
(a) The up-conversion emissions of xEr3+ (x = 2, 4, 6, 8 mol%) doped YOF submicron-crystals (calcined at 1100°C for 2 h). Inset: the enlarged image of the curves in range from 750 nm to 900 nm. (b) Ratio of the intensity of green emission (540 nm) to red emission (640 nm), G/R versus Er3+ concentration. (c) The peak intensity of the 800 nm emission versus Er3+ concentration.
