Identification of a quenching species in ruthenium tris-bipyridine electroluminescent devices.
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.
Soltzberg
Leonard J
LJ
Department of Chemistry and Physics, Simmons College, Boston, Massachusetts 02115, USA. lsoltzberg@simmons.edu
Slinker
Jason D
JD
Flores-Torres
Samuel
S
Bernards
Daniel A
DA
Malliaras
George G
GG
Abruña
Hector D
HD
Kim
Ji-Seon
JS
Friend
Richard H
RH
Kaplan
Michael D
MD
Goldberg
Velda
V