Efficient Red Electroluminescent Devices Based on Inter-Ligand Energy Transfer of Heteroleptic Tris-Cyclometaiated iridium Complexes

摘要

Red heteroleptic tris-cyclometalated iridium complex, Ir(ppy){sub}2(dpq-3-F), have been characterized. When Ir(ppy){sub}2(dpq-3-F) is placed in the excited state, the excitation energy is quickly intramolecular transferred from two ppy to one luminescent dpq-3-F. Thus, Ir(ppy){sub}2(dpq-3-F) shows emission at 620nm from dpq-3-F. The device with Ir(ppy){sub}2(dpq-3-F) showed superior electrical characteristics by decreasing self-quenching.