Issue 33, 2017

Intermolecular states in organic dye dispersions: excimers vs. aggregates

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

Supplementary files

Article information

Article type
Paper
Submitted
14 jun 2017
Accepted
05 jul 2017
First published
05 jul 2017
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2017,5, 8380-8389

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, 5, 8380 DOI: 10.1039/C7TC02655B

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