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    Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors

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    Type
    Article
    Authors
    Ahmed, Ghada H. cc
    Liu, Jiakai cc
    Parida, Manas R. cc
    Banavoth, Murali cc
    Bose, Riya
    AlYami, Noktan Mohammed cc
    Hedhili, Mohamed N. cc
    Peng, Wei cc
    Pan, Jun cc
    Besong, Tabot M.D. cc
    Bakr, Osman cc
    Mohammed, Omar F. cc
    KAUST Department
    Chemical Science Program
    Functional Nanomaterials Lab (FuNL)
    Imaging and Characterization Core Lab
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Surface Science
    Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
    Date
    2016-09-22
    Online Publication Date
    2016-09-22
    Print Publication Date
    2016-10-06
    Permanent link to this record
    http://hdl.handle.net/10754/622463
    
    Metadata
    Show full item record
    Abstract
    Hybrid organic/inorganic perovskites have recently emerged as an important class of materials and have exhibited remarkable performance in photovoltaics. To further improve their device efficiency, an insightful understanding of the interfacial charge transfer (CT) process is required. Here, we report the first direct experimental observation of the tremendous effect that the shape of perovskite nanocrystals (NCs) has on interfacial CT in the presence of a molecular acceptor. A dramatic change in CT dynamics at the interfaces of three different NC shapes, spheres, platelets, and cubes, is recorded. Our results clearly demonstrate that the mechanism of CT is significantly affected by the NC shape. More importantly, the results demonstrate that complexation on the NC surface acts as an additional driving force not only to tune the CT dynamics but also to control the reaction mechanism at the interface. This observation opens a new venue for further developing perovskite NCs-based applications.
    Citation
    Ahmed GH, Liu J, Parida MR, Murali B, Bose R, et al. (2016) Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors. The Journal of Physical Chemistry Letters 7: 3913–3919. Available: http://dx.doi.org/10.1021/acs.jpclett.6b01910.
    Sponsors
    This work was supported by King Abdullah University of Science and Technology (KAUST) and the Islamic Development Bank (IDB). Also, part of this work was supported by Saudi Arabia Basic Industries Corporation (SABIC) Grant RGC/3/2470-01.
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry Letters
    DOI
    10.1021/acs.jpclett.6b01910
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.jpclett.6b01910
    Scopus Count
    Collections
    Articles; Imaging and Characterization Core Lab; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

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