Figure 3

1.5 μm (left) and 2.7 μm (right) emissions of the present samples under 980 nm excitation.
The inset is the decay lifetime of the 1.5 μm emission.
1.5 μm (left) and 2.7 μm (right) emissions of the present samples under 980 nm excitation.
The inset is the decay lifetime of the 1.5 μm emission.