Importance

Loading Importance Indicators...

Abstract

There is disclosed herein phosphorescent compounds, uses thereof, and devices including organic light emitting diode (OLEDs) including such compounds.Compounds of interest include:The anionic chelating chromophores N^N, which are formed by connecting one pentagonal ring structure containing at least two nitrogen atoms to a hexagonal pyridine type of fragment via a direct carbon-carbon linkage.L is a neutral donor ligand; the typical example includes carbonyl, pyridine, phosphine, arsine and isocyanide; two neutral L's can also combine to produce the so-called chelating ligand such as 2,2′-bipyridine, 1,10-phenanthroline and N-heterocyclic carbene (NHC) ligand, or bidentate phosphorous ligands such as 1,2-bis(diphenylphosphino)ethane, 1,2-bis(diphenylphosphino)benzene.L can occupy either cis or trans orientation.When L occupies the trans position, the preferred structure contains both the hexagonal fragment of N^N as well as its pentagonal fragment located at the trans position respect to their counterparts of the second N^N chromophore.

Loading the Abstract Image...

First Claim