High-performance two-photon absorption luminophores: large action cross sections, free from fluorescence quenching and tunable emission of efficient non-doped organic light-emitting diodes

摘要

Two novel quadrupolar D-π-D type two-photon absorption (2PA) luminophores PA2F4H8E8 and AnA2F4H8E8 were synthesized by Wittig-Horner reaction in high yields. By using distyrylbenzene as the π-bridge center, PA2F4H8E8 shows two-photon absorption aggregation-induced emission enhancement (2PA-A1EE) and exhibits exceptionally large 2PA and 2PA action cross-sections up to ~6300 GM and ~1400 GM at 800 nm in THF, respectively. A non-doped electroluminescent (EL) device of PA2F4H8E8 displays good performance with an extremely low turn-on voltage of 2.6 V and a high brightness of 9837 cd m~(-2).