FIG. 3.

Low-lying singlet excitations of acenes calculated with TD-OTRSH-PBE and G₀W₀-BSE@OTRSH-PBE in panels (a) and (b); ${}^{1}L_a$ and ${}^{1}L_b$ excitation energies, with blue and orange lines, respectively, are compared to CCSD(T) references from Refs. 8 and 37 (dashed lines). The corresponding excitations with the TDA at the TDDFT and GW-BSE theories are shown in panels (c) and (d).