title: Identification of a quenching species in ruthenium tris-bipyridine electroluminescent devices.
abstract: We have used matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry and micro-Raman spectroscopy to identify a quenching species that is formed during operation of [Ru(bpy)3]2+ electroluminescent devices. We identify this performance-degrading product to be the oxo-bridged dimer [(bpy)2(H2O)RuORu(OH2)(bpy)2]4+ and show this dimer to be an effective quencher of device luminescence. This work is the first to detect a specific chemical degradation product formed during iTMC OLED operation.
authors.affiliation: Department of Chemistry and Physics, Simmons College, Boston, Massachusetts 02115, USA. lsoltzberg@simmons.edu
authors.forename: Leonard J
authors.initials: LJ
authors.lastname: Soltzberg
authors.forename: Jason D
authors.initials: JD
authors.lastname: Slinker
authors.forename: Samuel
authors.initials: S
authors.lastname: Flores-Torres
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Bernards
authors.forename: George G
authors.initials: GG
authors.lastname: Malliaras
authors.forename: Hector D
authors.initials: HD
authors.lastname: Abruña
authors.forename: Ji-Seon
authors.initials: JS
authors.lastname: Kim
authors.forename: Richard H
authors.initials: RH
authors.lastname: Friend
authors.forename: Michael D
authors.initials: MD
authors.lastname: Kaplan
authors.forename: Velda
authors.initials: V
authors.lastname: Goldberg