title: Electroluminescence in ruthenium(II) complexes.
abstract: We have investigated the electrochemical, spectroscopic, and electroluminescent properties of a family of diimine complexes of Ru featuring various aliphatic side chains as well as a more extended pi-conjugated system. The performance of solid-state electroluminescent devices fabricated from these complexes using indium tin oxide (ITO) and gold contacts appears to be dominated by ionic space charge effects. Their electroluminescence efficiency was limited by the photoluminescence efficiency of the Ru films and not by charge injection from the contacts. The incorporation of di-tert-butyl side chains on the dipyridyl ligand was found to be the most beneficial substitution in terms of reducing self-quenching of luminescence.
authors.affiliation: Department of Chemistry and Chemical Biology, Baker Lab, Cornell University, Ithaca, New York 14853-1301, USA.
authors.forename: Stefan
authors.initials: S
authors.lastname: Bernhard
authors.forename: Jason A
authors.initials: JA
authors.lastname: Barron
authors.forename: Paul L
authors.initials: PL
authors.lastname: Houston
authors.forename: Héctor D
authors.initials: HD
authors.lastname: Abruña
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Ruglovksy
authors.forename: Xicun
authors.initials: X
authors.lastname: Gao
authors.forename: George G
authors.initials: GG
authors.lastname: Malliaras