High-efficiency solution processable electrophosphorescent iridium complexes bearing polyphenylphenyl dendron ligands

Synthesis of cationic iridium(III) complexes with high quantum yield via enhancing the steric hindrance of ligands

“…The cyclometalated chloride-bridged dimers were synthesized according to a procedure described in the literature [49] by refluxing IrCl 3 $3H 2 O with the corresponding cyclometalated ligands in the mixture of 2-ethoxythanol and water. The cationic Ir(III) complexes were readily achieved from the reaction of cyclometalated chloride-bridged dimers with corresponding ancillary ligands by a bridge-splitting reaction, respectively.…”

Application of heteroleptic iridium complexes with fluorenyl-modified 1-phenylisoquinoline ligand for high-efficiency red polymer light-emitting devices

“…Ostrowski et al designed a series of Ir complexes with fluorene-modified phenylpyridine ligand resistant to crystallization, and obtained green and orange emission [16]. Huang plexes bearing fluorene-modified polyphenylphenyl dendron ligands, the efficiencies reached to 42.5 cd/A and 12.8%, respectively [17]. It was reported that triazolyl pyridine ligand could be used to be ancillary ligands to prepare blue phosphorescent complexes [18,19] and benzoimidazoles as cyclometalated ligands to prepare high thermal stability green to yellow complexes [20,21].…”