New Iridium Complexes with Cyclometalated Alkenylquinoline Ligands as Highly Efficient Saturated Red‐Light Emitters for Organic Light‐Emitting Diodes
Dinesh Kumar RayabarapuB. M. J. S. PauloseJ.‐P. DuanChien‐Hong Cheng
Abstract
Electroluminescent devices using new iridium complexes (see Figure) (PEQ)2Ir(acetylacetonate (acac)), (MPEQ)2Ir(acac), and (PEIQ)2Ir(acac), as dopant emitters give saturated red light with very high brightness and efficiencies. For example, a (PEQ)2- Ir(acac)-based device showed Commission Internationale de L'Eclairage (CIE) coordinates (0.66, 0.33), brightness, and external quantum efficiency of 26400 cd m–2 and 7.23 %, respectively.
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