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Intermolecular states in organic dye dispersions: excimers vs. aggregates

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Abstract

Rapid excited-state quenching in the solid state is a widespread limitation for organic chromophores. Even when molecules are dispersed in neutral host matrices, photoluminescence quantum yields decrease sharply with increased concentration, pointing to efficient intermolecular non-radiative decay pathways that remain poorly understood. Here we study the nature of the intermolecular states formed in dispersions of the prototypical BODIPY dyes. Using temperature-dependent and time-resolved photoluminescence measurements, we describe the processes of energy transfer into excimer states and, in materials with suitable chemical structure, excitonically coupled dimers. These dimer states exhibit remarkable near-unity quantum yield.

Graphical abstract: Intermolecular states in organic dye dispersions: excimers vs. aggregates

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Publication details

The article was received on 14 Jun 2017, accepted on 05 Jul 2017 and first published on 05 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02655B
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Intermolecular states in organic dye dispersions: excimers vs. aggregates

    A. J. Musser, S. K. Rajendran, K. Georgiou, L. Gai, R. T. Grant, Z. Shen, M. Cavazzini, A. Ruseckas, G. A. Turnbull, I. D. W. Samuel, J. Clark and D. G. Lidzey, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC02655B

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