Excitonic linewidth of organic quantum wires generated in reduced dimensionality matrices. Issue 18 (25th April 2016)

• Record Type: Journal Article
• Authors: Barisien, Thierry; Legrand, Laurent; Mu, Zhao; Hameau, Sophie
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 18(2016)
• Page Start: 12928
• Page End: 12937
• Publication Date: 2016-04-25
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp00629a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Nanostructured crystalline film achieving a 2D bath for single conjugated polymer chain linewidth spectroscopy. 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.