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    Chalcogenophene comonomer comparison in small band gap diketopyrrolopyrrole-based conjugated polymers for high-performing field-effect transistors and organic solar cells

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    Type
    Article
    Authors
    Ashraf, Raja Shahid
    Meager, Iain
    Nikolka, Mark cc
    Kirkus, Mindaugas cc
    Planells, Miquel
    Schroeder, Bob C. cc
    Holliday, Sarah
    Hurhangee, Michael
    Nielsen, Christian Bergenstof
    Sirringhaus, Henning
    McCulloch, Iain cc
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    Date
    2015-01-14
    Online Publication Date
    2015-01-14
    Print Publication Date
    2015-01-28
    Permanent link to this record
    http://hdl.handle.net/10754/564023
    
    Metadata
    Show full item record
    Abstract
    The design, synthesis, and characterization of a series of diketopyrrolopyrrole-based copolymers with different chalcogenophene comonomers (thiophene, selenophene, and tellurophene) for use in field-effect transistors and organic photovoltaic devices are reported. The effect of the heteroatom substitution on the optical, electrochemical, and photovoltaic properties and charge carrier mobilities of these polymers is discussed. The results indicate that by increasing the size of the chalcogen atom (S < Se < Te), polymer band gaps are narrowed mainly due to LUMO energy level stabilization. In addition, the larger heteroatomic size also increases intermolecular heteroatom-heteroatom interactions facilitating the formation of polymer aggregates leading to enhanced field-effect mobilities of 1.6 cm2/(V s). Bulk heterojunction solar cells based on the chalcogenophene polymer series blended with fullerene derivatives show good photovoltaic properties, with power conversion efficiencies ranging from 7.1-8.8%. A high photoresponse in the near-infrared (NIR) region with excellent photocurrents above 20 mA cm-2 was achieved for all polymers, making these highly efficient low band gap polymers promising candidates for use in tandem solar cells. (Graph Presented).
    Citation
    Ashraf, R. S., Meager, I., Nikolka, M., Kirkus, M., Planells, M., Schroeder, B. C., … McCulloch, I. (2015). Chalcogenophene Comonomer Comparison in Small Band Gap Diketopyrrolopyrrole-Based Conjugated Polymers for High-Performing Field-Effect Transistors and Organic Solar Cells. Journal of the American Chemical Society, 137(3), 1314–1321. doi:10.1021/ja511984q
    Sponsors
    This work was carried out primarily with funding and supports from the X10D Project (EC 287818) and The Leventis Foundation with support from EPSRC (EP/G037515/1 and EP/L016702/1). M.K. acknowledges support from Nano-matcell Project (EU 308997), and M.P. acknowledges support from the Artesun Project (EU 604397).
    Publisher
    American Chemical Society (ACS)
    Journal
    Journal of the American Chemical Society
    DOI
    10.1021/ja511984q
    ae974a485f413a2113503eed53cd6c53
    10.1021/ja511984q
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Solar Center (KSC)

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