We proceed to detailed results for the individual functionals. For PBE we find two sets of four almost degenerate CT states (two singlets and two triplets). These can be understood in the sense that they are composed of independent Cz→BDT transitions on the left and right hand side of the molecule, which are effectively decoupled and neither split via Coulomb nor exchange interactions. The exciton sizes are all above 10 Å, which is similar to the distance from the centre of the Cz donor to the centre of the BDT acceptor highlighting that charge transfer between them dominates with no intermediate locally excited contributions playing a role. Considering the global hybrid PBE0, we still find significant amounts of CT character for the first four states but there is already much more structure when compare to PBE. In particular, it is found that the T 1 state has enhanced local character (blue) and an associated reduction in exciton size to 7. glet states around 3 eV with a mixture of local ππ * and nπ * as well as CT character. We find two bright states at 3.01 and 3.06 eV, which possess significant amounts of, both, nπ * and CT character. This should be understood in the sense that there is an accidental degeneracy between an nπ * and CT state, producing this mixing. Moving to the remaining two functionals, we find that the first state with appreciable CT character is above 3.5 eV for CAM-B3LYP and no CT state is found at all for ωB97X-V within the energy window considered (up to 4.5 eV).