| 摘要 |
The present invention provides a method for the preparation of polymeric organic iridium complexes useful in electronic devices such as OLEDs. The method provides polymeric organic iridium compositions comprising at least one cyclometallated ligand and at least one ketopyrrole ligand. The polymeric organic iridium compositions provided are referred to as Type (2) organic iridium compositions and are constituted such that at least one ligand of the polymeric organic iridium compound has a number average molecular weight of 2,000 grams per mole or greater (as measured by gel permeation chromatography). Type (2) organic iridium compositions are referred to herein as comprising "polymeric organic iridium complexes". In one embodiment, the method comprises providing a non-polymeric organic iridium complex comprising one or more reactive functional groups and carrying out a polymerization step to provide the polymeric organic iridium complex comprising at least one cyclometallated ligand and at least one ketopyrrole ligand.
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