Figure 12
From: Facile synthesis and emission enhancement in NaLuF4 upconversion nano/micro-crystals via Y3+ doping
Decay curves of (a) 1G4 →3H6 (477 nm) and (b) 1G4 →3F4 (649 nm) transitions of Tm3+ in α-NaLuF4:20%Yb3+, 1%Tm3+ nanocrystals doped with 0, 40 and 79 mol% Y3+.
