This image depicts the structure of the proposed organic molecule, alongside the energy level diagrams of two-photon absorption (left side) and thermally activated delayed fluorescence (right side).

α 2 (ω 1; ω 2) is the ND-2PA coefficient for optical frequencies ω 1,2 and their associated irradiances I 1,2, E p is the Kane energy parameter, E gap is the bandgap energy, n 1,2 are the refractive ...