TY - JOUR
T1 - Shape-Tunable Charge Carrier Dynamics at the Interfaces between Perovskite Nanocrystals and Molecular Acceptors
AU - Ahmed, Ghada H.
AU - Liu, Jiakai
AU - Parida, Manas R.
AU - Banavoth, Murali
AU - Bose, Riya
AU - AlYami, Noktan Mohammed
AU - Hedhili, Mohamed N.
AU - Peng, Wei
AU - Pan, Jun
AU - Besong, Tabot M.D.
AU - Bakr, Osman
AU - Mohammed, Omar F.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.
PY - 2016/9/22
Y1 - 2016/9/22
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/622463
UR - https://pubs.acs.org/doi/10.1021/acs.jpclett.6b01910
UR - http://www.scopus.com/inward/record.url?scp=84990193922&partnerID=8YFLogxK
U2 - 10.1021/acs.jpclett.6b01910
DO - 10.1021/acs.jpclett.6b01910
M3 - Article
C2 - 27640429
SN - 1948-7185
VL - 7
SP - 3913
EP - 3919
JO - The Journal of Physical Chemistry Letters
JF - The Journal of Physical Chemistry Letters
IS - 19
ER -