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Issue 5, 2016
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Phosphorescence quenching of fac-tris(2-phenylpyridyl)iridium(iii) complexes in thin films on dielectric surfaces

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Abstract

We study the influence of the film thickness on the time-resolved phosphorescence and the luminescence quantum yield of fac-tris(2-phenylpyridyl)iridium(III) [Ir(ppy)3]-cored dendrimers deposited on dielectric substrates. A correlation is observed between the surface quenching velocity and the quenching rate by intermolecular interactions in the bulk film, which suggests that both processes are controlled by dipole–dipole interactions between Ir(ppy)3 complexes at the core of the dendrimers. It is also found that the surface quenching velocity decreases as the refractive index of the substrate is increased. This can be explained by partial screening of dipole–dipole interactions by the dielectric environment.

Graphical abstract: Phosphorescence quenching of fac-tris(2-phenylpyridyl)iridium(iii) complexes in thin films on dielectric surfaces

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Article information


Submitted
29 Oct 2015
Accepted
21 Dec 2015
First published
21 Dec 2015

This article is Open Access

Phys. Chem. Chem. Phys., 2016,18, 3575-3580
Article type
Paper

Phosphorescence quenching of fac-tris(2-phenylpyridyl)iridium(III) complexes in thin films on dielectric surfaces

J. C. Ribierre, A. Ruseckas, S. V. Staton, K. Knights, N. Cumpstey, P. L. Burn and I. D. W. Samuel, Phys. Chem. Chem. Phys., 2016, 18, 3575
DOI: 10.1039/C5CP06584D

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