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, I. D.W. Samuel

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    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.

    Original languageEnglish
    Pages (from-to)3575-3580
    Number of pages6
    JournalPhysical Chemistry Chemical Physics
    Volume18
    Issue number5
    DOIs
    Publication statusPublished - 2016

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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