An analysis of the excited states of Cz-BDT-SO 2 and Cz-BDF at their S 0 , S 1 , and T 1 optimised geometries in solution is presented in Fig. . The data shown is analogous to Figs and with the exception that we only present results using the higher-level state-specific solvation models here. Starting with Cz-BDT-SO 2 shown on the left in Fig. , we find that the excitation energies are significantly reduced when compared to Cz-BDT with all seven calculated excited states at or below 2.0 eV in the ptSS scheme at S 0 geometry. The two low lying triplet states are predominantly locally excited, with only slightly enhanced CT character when compared to Cz-BDT. The S 1 is found to be a CT state with predominant Cz→core contributions located at 1.73 eV and, as opposed to Cz-BDT, S 1 is bright with an oscillator strength of Optimisation of Cz-BDT-SO 2 in the S 1 state only has a negligible effect on energies and characters of the first four excited states. Up to S 2 , the only notable change is some mixing and symmetry breaking between S 1 and S 2 meaning that both states obtain some non-vanishing oscillator strength, their amount of CT character is slightly altered, and their d he values deviate from zero. Importantly, the S 1 remains bright at the S 1 geometry meaning that emission from this state is favoured. For the higher excited states some reordering is observed, e.g., the nπ * -state disappears and all states obtain some partial CT character. Optimisation of T 1 further stabilises the T 1 energy to 1.06 eV, thus, yielding an adiabatic ∆E ST of 0.67 eV. Optimisation of T 1 also slightly re-duces the CT character of this state, as seen by the exciton size, which is reduced from 5.64 Å at the S 0 geometry to 5.35 Å. At the T 1 geometry, also the other states obtain reduced CT character as seen by reduced exciton sizes and red Cz→core bars.