Push–Pull AIEgens

Acetylene bridged alkoxyphenanthrene and triarylamine-based triads for low threshold voltage with high mobility OFETs

“…The aldehyde substituted TAA, 12d makes the molecule a push-pull system via the inductive effect, which is a feasible structure for high charge carrier mobility up to 3 cm 2 V À1 s À1 , and thus results in a high-performing device in all characteristics. 56,57 The incorporation of ethynyl linkers assists in improving the rigidity, which can decrease the reorganization energy and enhance intermolecular packing in the solid state, leading to strong intermolecular electronic interactions with minimum distances between OÁ Á ÁH, OÁ Á ÁO, and NÁ Á ÁH bonds. 58 The presence of non-covalent interactions improves the delocalization of the frontier orbitals, resulting in increased charge transport mobility.…”