Efficient red-emitting cyclometalated iridium(III) complex and applications of organic light-emitting diode

Novel red phosphorescent emitter bis(2,3-diphenylquinolinato-N,C-2') iridium(acetylacetonate) [(23dpq)(2)Ir(acac)] has been synthesised and fully characterized. A highly efficient red organic light-emitting diode was fabricated by using (23dpq)(2)Ir(acac) as an emitter, in which (23dpq) 2Ir(acac) was synthesised from a well-designed ligand-2,3-diphenylquinoline. Electroluminescent device with a configuration of ITO/2-TNATA/NPB/BAlq:(23dpq)(2)Ir(acac)/AlQ(3)/LiF/Al was fabricated. The device using (23dpq)(2)Ir(acac) as a dopant showed pure-red emission with 1931 CIE (Commission International de L'Eclairage) chromaticity coordinates x = 0.66, y = 0.34. (c) 2009 Elsevier B.V. All rights reserved.