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    Naphthacenodithiophene Based Polymers-New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency

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    PDFsam_Nielsen Naphthacenodithiophene Based Polymers 2016 Accepted.pdf
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    Type
    Article
    Authors
    Knall, Astrid Caroline
    Ashraf, Raja Shahid
    Nikolka, Mark cc
    Nielsen, Christian B.
    Purushothaman, Balaji
    Sadhanala, Aditya
    Hurhangee, Michael
    Broch, Katharina
    Harkin, David J.
    Novák, Jiří
    Neophytou, Marios
    Hayoz, Pascal
    Sirringhaus, Henning
    McCulloch, Iain cc
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    Date
    2016-08-18
    Online Publication Date
    2016-08-18
    Print Publication Date
    2016-10
    Embargo End Date
    2017-08-18
    Permanent link to this record
    http://hdl.handle.net/10754/622111
    
    Metadata
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    Abstract
    Wide-bandgap conjugated polymers with a linear naphthacenodithiophene (NDT) donor unit are herein reported along with their performance in both transistor and solar cell devices. The monomer is synthesized starting from 2,6-dihydroxynaphthalene with a double Fries rearrangement as the key step. By copolymerization with 2,1,3-benzothiadiazole (BT) via a palladium-catalyzed Suzuki coupling reaction, NDT-BT co-polymers with high molecular weights and narrow polydispersities are afforded. These novel wide-bandgap polymers are evaluated as the semiconducting polymer in both organic field effect transistor and organic photovoltaic applications. The synthesized polymers reveal an optical bandgap in the range of 1.8 eV with an electron affinity of 3.6 eV which provides sufficient energy offset for electron transfer to PC70BM acceptors. In organic field effect transistors, the synthesized polymers demonstrate high hole mobilities of around 0.4 cm2 V–1 s–1. By using a blend of NDT-BT with PC70BM as absorber layer in organic bulk heterojunction solar cells, power conversion efficiencies of 7.5% are obtained. This value is among the highest obtained for polymers with a wider bandgap (larger than 1.7 eV), making this polymer also interesting for application in tandem or multijunction solar cells. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
    Citation
    Knall A-C, Ashraf RS, Nikolka M, Nielsen CB, Purushothaman B, et al. (2016) Naphthacenodithiophene Based Polymers-New Members of the Acenodithiophene Family Exhibiting High Mobility and Power Conversion Efficiency. Advanced Functional Materials 26: 6961–6969. Available: http://dx.doi.org/10.1002/adfm.201602285.
    Sponsors
    This work was carried out with financial support from BASF. Funding is gratefully acknowledged from Austrian Science Fund (FWF): T578-N19, EC FP7 Project SC2 (610115), EC FP7 Project ArtESun (604397), EPSRC EP/G037515/1, and EPSRC EP/M005143/1. The authors thank Dr. T. Arnold, Diamond Light Source, Didcot, UK and J. Rozbořil, Masaryk University, Brno, Czech Republic for assistance with the GIWAXS-measurements. Financial support from Diamond Light Source is gratefully acknowledged. K. B. gratefully acknowledges financial support from the German Research Foundation (BR 4869/1-1). J. N. acknowledges support from the project CEITEC 2020 (grant No. LQ1601 financed by the MEYS of the Czech Republic).
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201602285
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/adfm.201602285/full
    https://qmro.qmul.ac.uk/xmlui/bitstream/123456789/16294/3/Nielsen%20Naphthacenodithiophene%20Based%20Polymers%202016%20Accepted.pdf
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201602285
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

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