Excitonic linewidth of organic quantum wires generated in reduced dimensionality matrices

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 achi...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2016-05, Vol.18 (18), p.12928-12937
Main Authors: Barisien, Thierry, Legrand, Laurent, Mu, Zhao, Hameau, Sophie
Format: Article
Language:English
Subjects:
Coherence
Condensed Matter
Coupling
Crystal structure
Deposition
Excitation
Physics
Quantum wires
Semiconductors
Wire
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Summary: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. Nanostructured crystalline film achieving a 2D bath for single conjugated polymer chain linewidth spectroscopy.
ISSN:1463-9076
1463-9084
DOI:10.1039/c6cp00629a