Diffusion Enhanced Upconversion in Organic Systems
Figure 3
Relative PL
quantum yields of the PtOEP PL as a function of the DPA concentration at 77 K
(blue circles) and 300 K (red circles). The dashed line has been calculated by
combining the contribution of the molecular diffusion and the ET process as a
contact interaction. The continuous line is the fit of the data collected at 77 K considering a pure Dexter ET (Dexter radius ).
