Issue 18, 2016

Excitonic linewidth of organic quantum wires generated in reduced dimensionality matrices

Abstract

Luminescent organic quantum wires are generated in diacetylene crystalline ultra-thin films grown on orientation-inducing surfaces obtained by poly-tetrafluoroethylene (teflon) deposition. The films are characterized by atomic force microscopy showing that quasi-two-dimensional surroundings are achieved. In this particular environment, pure dephasing processes still determine the wires’ homogeneous emission widths, measured using micro-photoluminescence. Coherence times that are slightly shorter in the films also exhibit a distinctive temperature dependence. A model inspired by semiconductor physics for exciton–phonon coupling accounts for the observed behaviour and evidences the role of matrix dimensionality on the coherence properties.

Graphical abstract: Excitonic linewidth of organic quantum wires generated in reduced dimensionality matrices

Supplementary files

Article information

Article type
Paper
Submitted
28 Jan 2016
Accepted
13 Apr 2016
First published
13 Apr 2016

Phys. Chem. Chem. Phys., 2016,18, 12928-12937

Excitonic linewidth of organic quantum wires generated in reduced dimensionality matrices

T. Barisien, L. Legrand, Z. Mu and S. Hameau, Phys. Chem. Chem. Phys., 2016, 18, 12928 DOI: 10.1039/C6CP00629A

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