Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors
Type
ArticleAuthors
Ahmed, Ghada H.
Liu, Jiakai

Parida, Manas R.

Banavoth, Murali

Bose, Riya
AlYami, Noktan Mohammed

Hedhili, Mohamed N.

Peng, Wei

Pan, Jun

Besong, Tabot M.D.

Bakr, Osman

Mohammed, Omar F.

KAUST Department
Chemical Science ProgramFunctional 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
2016-09-22Online Publication Date
2016-09-22Print Publication Date
2016-10-06Permanent link to this record
http://hdl.handle.net/10754/622463
Metadata
Show full item recordAbstract
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)ae974a485f413a2113503eed53cd6c53
10.1021/acs.jpclett.6b01910