title: Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors.
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.
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Ghada H
authors.initials: GH
authors.lastname: Ahmed
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Jiakai
authors.initials: J
authors.lastname: Liu
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Manas R
authors.initials: MR
authors.lastname: Parida
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Banavoth
authors.initials: B
authors.lastname: Murali
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Riya
authors.initials: R
authors.lastname: Bose
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Noktan M
authors.initials: NM
authors.lastname: AlYami
authors.affiliation: Imaging and Characterization Laboratory, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Mohamed N
authors.initials: MN
authors.lastname: Hedhili
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Wei
authors.initials: W
authors.lastname: Peng
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Jun
authors.initials: J
authors.lastname: Pan
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Tabot M D
authors.initials: TM
authors.lastname: Besong
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Osman M
authors.initials: OM
authors.lastname: Bakr
authors.affiliation: Solar and Photovoltaics Engineering Research Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology , Thuwal 23955-6900, Kingdom of Saudi Arabia.
authors.forename: Omar F
authors.initials: OF
authors.lastname: Mohammed