We also observe a maximum trapping at 86% and saturation at 10 cm 2 /s, which reflects the population of NPLs which have no traps (i.e. the excitons on these NPLs will always recombine). The saturation would only reach 100% quenching if every NPL has at least one trap. Although we show the results of a Poissonian distribution of traps, we also calculate the diffusion constant from a uniform number of traps/NPL in Figure .