Only 6 out of the 31 materials have a higher TTA driving force than rubrene and perylene: pyracylene (KEGHEJ01), 11-phenylbenzo[a]naphtho[2,1,8cde]perylene (KAGFUV), the two polymorphs of diindeno[1,2,3cd:1',2',3'-lm]perylene (POBPIG and POBPIG06), anthra(2,1,9,8hijkl)benzo(de)naphtho(2,1,8,7-stuv)pentacene (BOXGAW), and dibenzo(def,i)naphtho(1,8,7-v,w,x)pyranthrene (DUPHAX). All of these have GW +BSE triplet excitation energies in the near-IR and their GW +BSE optical gaps range from 2.08 eV for crystalline pyracylene to 2.41 eV for KAGFUV. Materials in the PAH101 set with lower triplet excitation energies tend to be more likely to undergo SF than TTA. All five compounds have been previously assessed in Ref. as isolated molecules rather than crystals, using a different GW +BSE implementation. Therein, the likelihood of the competing process of conversion of two excitons in the first triplet state to one exciton in a higher triplet state instead of a singlet exciton was also considered. Based on these energetic considerations, pyracylene (labeled as compound C1 in Ref. ) appeared promising, however it is not a good TTA chromophore because of its short triplet state lifetime and the rapid non-radiative decay of its lowest singlet state. POBPIG is a perylene derivative (labeled as compound D16 in Ref. ), for which the competing conversion to a higher triplet state was found to be too energetically favorable for high-yield TTA. KAGFUV, BOXGAW, and DUPHAX are large aromatic compounds comprising several fused six-membered rings that can be classified as graphene flakes. Of these, KAGFUV (labeled as compound E2 in Ref. ) and DUPHAX (labeled as compound E3 in Ref. ) were identified as TTA candidates based on energetic considerations.