Moreover, the presence of dicarboximide functional groups was associated with lower charge recombination descriptors, but higher effective masses. A similar pattern is present for CCOF-1, with high effective masses but low charge recombination descriptor. Such observations could derive from lower band dispersion, which reduces the possibility of detrimental charge recombination, but can also reduce charge-carrier mobility. In fact, this behavior is observed in CCOF-1, with calculated band dispersion for VB and CB of 0.72 and 1.4 meV, respectively.