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    Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents

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    Type
    Article
    Authors
    Wadsworth, Andrew cc
    Ashraf, Raja
    Abdelsamie, Maged cc
    Pont, Sebastian
    Little, Mark S. cc
    Moser, Maximilian
    Hamid, Zeinab
    Neophytou, Marios
    Zhang, Weimin
    Amassian, Aram cc
    Durrant, James R. cc
    Baran, Derya cc
    McCulloch, Iain cc
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Organic Electronics and Photovoltaics Group
    Physical Science and Engineering (PSE) Division
    Date
    2017-06-05
    Online Publication Date
    2017-06-05
    Print Publication Date
    2017-07-14
    Permanent link to this record
    http://hdl.handle.net/10754/625072
    
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    Abstract
    With chlorinated solvents unlikely to be permitted for use in solution-processed organic solar cells in industry, there must be a focus on developing nonchlorinated solvent systems. Here we report high-efficiency devices utilizing a low-bandgap donor polymer (PffBT4T-2DT) and a nonfullerene acceptor (EH-IDTBR) from hydrocarbon solvents and without using additives. When mesitylene was used as the solvent, rather than chlorobenzene, an improved power conversion efficiency (11.1%) was achieved without the need for pre- or post-treatments. Despite altering the processing conditions to environmentally friendly solvents and room-temperature coating, grazing incident X-ray measurements confirmed that active layers processed from hydrocarbon solvents retained the robust nanomorphology obtained with hot-processed chlorinated solvents. The main advantages of hydrocarbon solvent-processed devices, besides the improved efficiencies, were the reproducibility and storage lifetime of devices. Mesitylene devices showed better reproducibility and shelf life up to 4000 h with PCE dropping by only 8% of its initial value.
    Citation
    Wadsworth A, Ashraf RS, Abdelsamie M, Pont S, Little M, et al. (2017) Highly Efficient and Reproducible Nonfullerene Solar Cells from Hydrocarbon Solvents. ACS Energy Letters: 1494–1500. Available: http://dx.doi.org/10.1021/acsenergylett.7b00390.
    Sponsors
    The authors thank KAUST for financial support, the Welsh Assembly Government Sêr Solar Project, and acknowledge EC FP7 Project SC2 (610115), EC H2020 (643791), and EPSRC Projects EP/G037515/1, EP/M005143/1, and EP/L016702/1.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.7b00390
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/acsenergylett.7b00390
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.7b00390
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Solar Center (KSC)

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