Figure 2From: Near-infrared quantum cutting in Ho3+, Yb3+-codoped BaGdF5 nanoparticles via first-and second-order energy transfersPLE and PL spectra by monitoring Ho3+emission. (a) PLE spectra by monitoring Ho3+: 5S2 → 5I8 emission at 540 nm and (b) visible PL spectra under excitation of 450 nm (5I8 → 5 G6, 5 F1) of BaGdF5: 1% Ho3+, x% Yb3+ (0 ≤ x ≤ 20) nanoparticles.Back to article page