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    Short contacts between chains enhancing luminescence quantum yields and carrier mobilities in conjugated copolymers.

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    Type
    Article
    Authors
    Thomas, Tudor H
    Harkin, David J
    Gillett, Alexander J
    Lemaur, Vincent
    Nikolka, Mark
    Sadhanala, Aditya
    Richter, Johannes M
    Armitage, John
    Chen, Hu cc
    McCulloch, Iain cc
    Menke, S Matthew
    Olivier, Yoann
    Beljonne, David
    Sirringhaus, Henning
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    Date
    2019-06-13
    Online Publication Date
    2019-06-13
    Print Publication Date
    2019-12
    Permanent link to this record
    http://hdl.handle.net/10754/656361
    
    Metadata
    Show full item record
    Abstract
    Efficient conjugated polymer optoelectronic devices benefit from concomitantly high luminescence and high charge carrier mobility. This is difficult to achieve, as interchain interactions, which are needed to ensure efficient charge transport, tend also to reduce radiative recombination and lead to solid-state quenching effects. Many studies detail strategies for reducing these interactions to increase luminescence, or modifying chain packing motifs to improve percolation charge transport; however achieving these properties together has proved elusive. Here, we show that properly designed amorphous donor-alt-acceptor conjugated polymers can circumvent this problem; combining a tuneable energy gap, fast radiative recombination rates and luminescence quantum efficiencies >15% with high carrier mobilities exceeding 2.4 cm2/Vs. We use photoluminescence from exciton states pinned to close-crossing points to study the interplay between mobility and luminescence. These materials show promise towards realising advanced optoelectronic devices based on conjugated polymers, including electrically-driven polymer lasers.
    Citation
    Thomas, T. H., Harkin, D. J., Gillett, A. J., Lemaur, V., Nikolka, M., Sadhanala, A., … Sirringhaus, H. (2019). Short contacts between chains enhancing luminescence quantum yields and carrier mobilities in conjugated copolymers. Nature Communications, 10(1). doi:10.1038/s41467-019-10277-y
    Sponsors
    We thank the Engineering and Physical Sciences Research Council (EPSRC) for funding through a programme grant (EP/M005143/1). T.H.T. thanks EPSRC for an Industrial CASE studentship, as well as the Cambridge Commonwealth Trust for funding. D.H. would like to thank the Doctoral Training Centre in Plastic Electronics EP/G037515/1, the Worshipful Company of Armourers and Brasiers, and St. Edmunds College, Cambridge. M.N. acknowledges financial support from the European Commission through a Marie-Curie Individual Fellowship (747461). We thank Aurélie Morley and Merck Chemicals Ltd. for providing IDT-F2BT, IDTT-H2BT and IDTT-F2BT. The work in Mons was supported by the Belgian National Science Foundation, F.R.S.-FNRS and by the European Commission/Région Wallonne (FEDER–BIORGEL project). Computational resources have been provided by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by F.R.S.-FNRS under Grant No. 2.5020.11, as well as the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under the grant agreement n1117545. The research in Mons is also through the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 646176 (EXTMOS project). D.B. is a FNRS Research Director.
    Publisher
    Springer Science and Business Media LLC
    Journal
    Nature communications
    DOI
    10.1038/s41467-019-10277-y
    Additional Links
    http://www.nature.com/articles/s41467-019-10277-y
    ae974a485f413a2113503eed53cd6c53
    10.1038/s41467-019-10277-y
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

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