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dc.contributor.authorKerfoot, James
dc.contributor.otherKorolkov, Vladimir V.
dc.contributor.otherSvatek, Simon A.
dc.contributor.otherAlkhamisi, Manal
dc.contributor.otherParkinson, Patrick W.
dc.contributor.otherBeton, Peter
dc.contributor.otherTaniguchi, Takashi
dc.contributor.otherWatanabe, Kenji
dc.description.abstractThe structural and functional properties of organic heterojunctions play a vitally important role in the operation of organic devices, but their properties are difficult to measure directly due to the buried interfaces which are typically formed. We have grown model heterojunctions consisting of two monolayer-thick organic semiconductors, and to use these bilayers to explore the two-dimensional dynamics of excitons. The heterostructures are formed by sequential deposition of monolayers of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI) and fullerene (C60) on hexagonal boron nitride (hBN). The morphology of these bilayers was characterized using atomic force microscopy and showed clear differences in the C60 growth kinetics on hBN and PTCDI. The variation in the fluorescence of PTCDI-C60 heterostructures with increasing fullerene coverage showed a reduction in intensity consistent with exciton diffusion and quenching. We use a simple model for the intensity dependence to determine the two-dimensional exciton diffusion length in a PTCDI monolayer finding a value of 17 ± 3 nm for this parameter.en_UK
dc.publisherThe University of Nottinghamen_UK
dc.titleTwo-dimensional diffusion of excitons in a perylene diimide monolayer quenched by a fullerene heterojunctionen_UK
dc.subject.freeHeterojunction, Heterostructure, Organic Heteroepitaxy, Exciton Quenching, 2D Materials, Self-Assemblyen_UK
dc.subject.jacsPhysical sciences::Physicsen_UK
dc.subject.lcQ Science::QD Chemistry::QD450 Physical and theoretical chemistryen_UK
dc.subject.lcT Technology::TK Electrical engineering. Electronics Nuclear engineeringen_UK
uon.divisionUniversity of Nottingham, UK Campus::Faculty of Science::School of Physics and Astronomyen_UK
uon.funder.controlledEngineering & Physical Sciences Research Councilen_UK
uon.datatypeRaw data files: AFM images (.ibw), photoluminescence spectra (.ls6 and .txt), optical microscopy images (.jpg)en_UK
uon.funder.freeLeverhulme Trusten_UK
uon.collectionmethodAtomic force microscopy, optical microscopy, fluorescence microscopyen_UK
uon.institutes-centresUniversity of Nottingham, UK Campusen_UK

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