@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
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@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
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    dct:description """
              We present a theoretical study of exciton dynamics in solutions and films of fluorene-based molecules, complemented by experimental work carried out by our colleagues at the University of St Andrews. We start by introducing the importance and relevance of such a study, and the methods we use to model ultra-fast (pico- and sub-picosecond) exciton photo-physics in these systems. We then demonstrate that exciton transfer in solution of some branched star-shaped oligofluorene-based molecules arises from molecular geometry relaxation, and, at a slower time-scale, from Forster hopping between the arms. Straight oligofluorenes do not exhibit ultra-fast exciton transfer in solution. Finally, we introduce improvements to the standard line-dipole theory which we use to build a microscopic model for ultra-fast exciton dynamics in polyfluorene films. Our results show very good agreement with experiments and enable us to gain fundamental insight into the exciton transfer processes in these materials.
            """ ;
    dct:identifier "tel-00991706" ;
    dct:issued "2026-05-05T11:07:54.899601"^^xsd:dateTime ;
    dct:language "en" ;
    dct:modified "2026-05-05T11:07:54.899605"^^xsd:dateTime ;
    dct:publisher <https://rec.harvest-normandie.data4citizen.com/organization/cce9db95-46d9-4dc2-84b6-764215d0a002> ;
    dct:title "Modelling ultrafast exciton transfer in fluorene-based organic semiconductors" ;
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            vcard:fn "CCSD" ] ;
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    dcat:keyword "dynamique-exciton",
        "exciton",
        "exciton-dynamics",
        "exciton-transfer",
        "infoeu-reposemanticsdoctoralthesis",
        "interactions-moleculaires",
        "modele-moleculaire-microscopic",
        "modelisation",
        "molecular-interactions",
        "molecular-microscopic-model",
        "molecular-semiconductors",
        "organic-semiconductors",
        "physcondcm-msphysics-physicscondensed-matter-cond-matmaterials-science-cond-matmtrl-sci",
        "physphysphys-chem-phphysics-physicsphysics-physicschemical-physics-physicschem-ph",
        "physphysphys-comp-phphysics-physicsphysics-physicscomputational-physics-physicscomp-ph",
        "quantum-chemistry",
        "semiconducteurs-organiques",
        "star-shaped-molecules",
        "theses",
        "transfert-dexciton" ;
    dcat:landingPage <https://theses.hal.science/tel-00991706> .

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    dct:issued "2026-05-05T11:07:54.914258"^^xsd:dateTime ;
    dct:modified "2026-05-05T11:07:54.871853"^^xsd:dateTime ;
    dct:title "Modelling ultrafast exciton transfer in fluorene-based organic semiconductors" ;
    dcat:accessURL <https://theses.hal.science/tel-00991706> .

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