P‐159: Efficient Red Electroluminescent Devices Based on Inter‐Ligand Energy Transfer of Heteroleptic Tris‐Cyclometalated Iridium Complexes

Abstract Red heteroleptic tris‐cyclometalated iridium complex, Ir(ppy) 2 (dpq‐3‐F), have been characterized. When Ir(ppy) 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) 2 (dpq‐3‐F) shows emission at 620nm from dpq‐3‐F. The device with Ir(ppy) 2 (dpq‐3‐F) showed superior electrical characteristics by decreasing self‐quenching.