Figure 12From: Highly Efficient Near-IR Photoluminescence of Er3+ Immobilized in Mesoporous SBA-15Fluorescence spectra of Yb-Er-SBA-15 under the 980 nm pump excitation for Er3+/Yb3+ concentration ratios of 1:10 (blue), 1:8 (green), 1:5 (red), and 1:3 (yellow)Back to article page