For interpretation of the optical absorption spectrum of Figure (a), Figure (a) gives the natural transition orbitals of select important electronic excitations. Transitions in Figure (a) and (b) are of the P2 polaron type. Figure (b) shows the first NTO pair of both α and β spin for the excitation at 832 nm. Both contributions can be identified as P2 transitions and the involved LUNTO profiles show typical features of the polaron orbitals. The β contribution is intramolecular and the α contribution is intermolecular. More specifically, the β contribution resembles the P2 transition that can be found for a single oligomer cation and the α contribution has clear CT character which is enabled by the proximity of the second conjugated chain. In the same band of the spectrum in Figure (a), the excitation at 899 nm is also a P2 transition, dominated by only one NTO pair in the α spin channel as shown in Figure . This transition also has a slightly mixed intra-and intermolecular character.