Fig. 3: The average Tm3+-to-Yb3+ energy transfer rate.
From: Understanding and tuning blue-to-near-infrared photon cutting by the Tm3+/Yb3+ couple
Inverse of the average lifetime of the Tm3+ 1G4 level in (a) YBO3, (b) YAG, (c) Y2O3, and (d) NaYF4 as a function of Yb3+ concentration. These values are extracted from the photoluminescence decay curves shown in Fig. 2e–h. The dotted lines are linear fits, and the dashed line in panel d is a quadratic fit
