External Magnetic Field-Driven Ambidextrous Circularly Polarized Electroluminescence from Organic Light-Emitting Diodes Containing Racemic Cyclometalated Iridium(III) Complexes
Kengo Hara, Ami Morimoto, Kana Matsudaira, Satoko Suzuki, Shigeyuki Yagi, Michiya Fujiki, Yoshitane Imai
The present communication reports the development of external magnetic field (EMF)-driven, ambidextrous, circularly polarized electroluminescence (CPEL) devices, by embedding racemic mixtures of phosphorescent organoiridium(III) emitters in the active emitting layer. Homoleptic tris-cyclometalated Ir(III)(ppy) 3 and heteroleptic bis-cyclometalated Ir(III)(ppy) 2 (acac) (ppy: 2-phenylpyridinate, acac: acetylacetonate) were used as the representative organoiridium(III) compounds. Chiroptical inversion of CPEL was influenced by the ligand environment in the Ir(III) complexes (homoleptic or heteroleptic), and the Faraday geometry.
communication, magnetic field, CPL