Figure 7. Schematic displaying the energy level landscape of the photoexcitations in the two types of doped CQDs.

Temperature-dependent characteristics of the photoexcitations obtained by PL and PLE experiments are schematically shown. In films doped during synthesis a uniform distribution of dopant-induced recombination channels promotes temperature-activated detrapping processes. For films doped post-synthetically by cation exchange reactions, the preferential distribution of such states on the CQD surface denefits exciton diffusion and temperature-activated trapping processes.