Evolution of 2, 3 ′-bipyridine class of cyclometalating ligands as efficient phosphorescent iridium(III) emitters for applications in organic light emitting diodes

Publication date: December 2016 Source:Journal of Photochemistry and Photobiology C: Photochemistry Reviews, Volume 29 Author(s): M.L.P. Reddy, K.S. Bejoymohandas Nowadays, the design and development of novel phosphorescent iridium(III) complexes for various optoelectronic applications is a well-recognized area of research. The fascinating photophysical properties of iridium(III) compounds are strongly influenced by the spin-orbit coupling exerted by the iridium(III) core, usually resulting in intense emissions with short excited-state lifetimes, which can be precisely controlled with the aid of molecular engineering of the chelating ligand. This review focuses on the recent developments and state of the art knowledge on phosphorescent iridium(III) compounds, especially on heteroleptic complexes derived from 2,3′-bipyridine class of cyclometalating and ancillary ligands, highlighting the excited state phenomenon behind their emission behavior. Graphical abstract

Source: Journal of Photochemistry and Photobiology C: Photochemistry Reviews - November 15, 2016 Category: Chemistry Source Type: research