This dependency with 1/r 4 is particularly important for interparticle distances above R0, because FRET efficiency decreases with a slower rate in this regime. In the CsPbBr3 PNPls system discussed here, this difference in the distance dependence is less important because, when these PNPls are stacked, the r is close to R0. For CsPbI3 PNPls, however, the R0 is higher than the interparticle distance and, therefore, FRET efficiency may be lower than our estimates because it increases more slowly when r < R0. In any case, in concentrated colloidal suspensions without the stacking (e.g., 40 mg/mL in hexane), this dependency of with 1/r 4 suggests that for FRET may have a more important contribution to the recombination dynamics of nanoplates when compared to nanocubes or spherical nanocrystals.