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    Fluorination Triggered New Small Molecule Donor Materials for Efficient As-Cast Organic Solar Cells

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    Type
    Article
    Authors
    Yang, Yuting
    Wang, Kai
    Li, Gongqiang
    Ran, Xueqin
    Song, Xin cc
    Gasparini, Nicola
    Zhang, Qian-Qian
    Lai, Xue
    Guo, Xiao
    Meng, Fei
    Du, Mengzhen
    Huang, Wei
    Baran, Derya cc
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2018-07-29
    Online Publication Date
    2018-07-29
    Print Publication Date
    2018-08
    Permanent link to this record
    http://hdl.handle.net/10754/630430
    
    Metadata
    Show full item record
    Abstract
    Solution-processable small molecules (SMs) have attracted intense attention due to their definite molecular structures, less batch-to-batch variation, and easier structure control. Herein, two new SM donors based on substituted isatin unit (DI3T, DI3T-2F) are synthesized and applied as electron donors with the mixture of PC71 BM to construct organic photovoltaics. As a result, 5,6-difluoro isatin derivative (DI3T-2F) obtains a power conversion efficiency of 7.80% by a simple solution spin-coating fabrication process without any additives, solvent, or thermal annealing process. More intuitively, due to stronger intermolecular interaction and higher hole mobility after the incorporation of fluorine atoms in end units, the devices present good tolerance to active layer thickness. The results indicate that DI3T-2F shows promising potential for large-scale printing processes and flexible application of efficient small molecule organic solar cells.
    Citation
    Yang Y, Wang K, Li G, Ran X, Song X, et al. (2018) Fluorination Triggered New Small Molecule Donor Materials for Efficient As-Cast Organic Solar Cells. Small 14: 1801542. Available: http://dx.doi.org/10.1002/smll.201801542.
    Sponsors
    This work was financially supported by the National Key R&D Program of China (2017YFA0204704), the National Science Foundation of China (51773091, 61604069), Natural Science Foundation of Jiangsu Province (BK20171465, BK20150064), and the High Performance Computing Center of Nanjing Tech University supporting the computational resources; X.S. N.G., and D.B. acknowledge King Abdullah University of Science and Technology (KAUST) Solar Center Competitive Fund (CCF) for financial support. The authors thank the beamline BL16B1 (Shanghai Synchrotron Radiation Facility) for providing the assistance.
    Publisher
    Wiley
    Journal
    Small
    DOI
    10.1002/smll.201801542
    Additional Links
    https://onlinelibrary.wiley.com/doi/full/10.1002/smll.201801542
    ae974a485f413a2113503eed53cd6c53
    10.1002/smll.201801542
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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