Blue-emitting Ir(III) complexes using fluorinated bipyridyl as main ligand and 1,2,4-triazol as ancillary ligand: syntheses, photophysical properties and performances in devices

Two blue-emitting Ir(III) complexes using 2-(3, 4, 5-trifluorophenyl)pyridine (F3,4,5 ppy) and 2-(2, 4-difluorophenyl)pyridine (F2,4ppy) as main ligands have been reported and their photophysical properties have been investigated. The (F2,4ppy)2Ir(tfmptz)-based devices have the superior performances with the current efficiency of 5.2 cd/A.