In addition to the S 1 /T 2 hopping channels, the ISC process has also been recorded along the S 1 /T 3 pathways, particularly in the 2-TP isomer models. For the various models of 2-TP, the T 2 and T 3 states exhibit an energy separation of ≈ 0.2-0.6 eV in their valence excitations. While the transition matrices suggest the existence of some additional hopping channels that might influence the triplet population, the number of singlet/triplet transitions through these pathways is limited. Therefore, an in-depth discussion of these pathways is not warranted.