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Issue 12, 2003
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Photophysical properties of tris(bipyridyl)ruthenium(II) thin films and devices

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Abstract

Absorption and luminescence spectra as well as luminescence lifetimes have been measured for Ru(bpy)2+3 in solution and in thin films of varying thicknesses, and these properties have been correlated with the efficiency of organic light emitting devices (OLEDs) made of the films. The lifetimes decrease for films below about 50 nm in thickness but are relatively constant for thicknesses above about 100 nm. This behavior is consistent with a model in which quenching is caused both by intrinsic properties of the molecules and by Förster energy transfer between chromophores that carries the excitation to surface layers, where the excitation is more efficiently quenched. The external quantum efficiency of the OLEDs is also found to increase with thickness, approaching 1% for thicknesses near 200 nm.

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Publication details

The article was received on 24 Feb 2003, accepted on 10 Apr 2003 and first published on 08 May 2003


Article type: Paper
DOI: 10.1039/B302119J
Citation: Phys. Chem. Chem. Phys., 2003,5, 2706-2709
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    Photophysical properties of tris(bipyridyl)ruthenium(II) thin films and devices

    K. W. Lee, J. D. Slinker, A. A. Gorodetsky, S. Flores-Torres, H. D. Abruña, P. L. Houston and G. G. Malliaras, Phys. Chem. Chem. Phys., 2003, 5, 2706
    DOI: 10.1039/B302119J

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