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Identification of a quenching species in ruthenium tris-bipyridine electroluminescent devices
Leonard J Soltzberg1, Jason D Slinker, Samuel Flores-Torres
1Department of Chemistry and Physics, Simmons College, Boston, Massachusetts 02115, USA. lsoltzberg@simmons.edu
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.
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