Journal article
Spontaneous Formation of a Ligand-Based 2D Capping Layer on the Surface of Quasi-2D Perovskite Films
F Zheng, T Raeber, S Rubanov, C Lee, A Seeber, C Hall, TA Smith, M Gao, D Angmo, KP Ghiggino
ACS Applied Materials and Interfaces | Published : 2022
Abstract
Two-dimensional (2D) Ruddlesden-Popper phase perovskites (RPPs) are attracting growing attention for photovoltaic applications due to their enhanced stability compared to three-dimensional (3D) perovskites. The superior tolerance of 2D RPPs films to moisture and oxygen is mainly attributed to the hydrophobic nature of the introduced long-chain spacer cations (ligands). In this work, it is revealed that a thin capping layer, consisting of self-assembled butylammonium ligands, is spontaneously formed on the top surface of a quasi-2D perovskite film prepared by conventional one-step hot casting. Based on morphological and crystallographic analyses of both the top/bottom surfaces and the interio..
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Awarded by Australian Centre for Advanced Photovoltaics
Funding Acknowledgements
Funding support from the ARC Centre of Excellence in Exciton Science (CE170100026) is acknowledged. T.R., M.G., and D.A. acknowledge the financial support from the Devices & Engineered System Program of CSIRO Manufacturing. C.L., T.A.S., M.G., and D.A. further acknowledge the Australian Centre for Advanced Photovoltaics (ACAP) program funded by the Australian Government through the Australian Renewable Energy Agency (ARENA). The Australian Government does not accept responsibility for the views, information, or advice expressed herein. C.H. is the recipient of an Australian Research Council Future Fellowship (FT210100113), funded by the Australian Government. GIWAX measurements were performed on the SAXS/WAXS beamline at the Australian Synchrotron facilities, part of ANSTO.