Noteworthy is that the two dimers with the most negative energy offsets corresponding to the two low energy CT states discussed in Section 3.2.1. In particular, CT 1 at energy 1.65 eV is found to have the highest coupling between the rubrene LE and the CT state. In comparison, the coupling to the lowest CT state, CT 0 , is smaller by a factor of 30. This raises the question what impact the differences in couplings have for the LE-CT conversion dynamics, particularly which of the CT states is most likely to be probed over which timescale.