Journal article
Brownian Tree-Shaped Dendrites in Quasi-2D Perovskite Films and Their Impact on Photovoltaic Performance
F Zheng, D Angmo, CR Hall, S Rubanov, F Yuan, JS Laird, M Gao, TA Smith, KP Ghiggino
Advanced Materials Interfaces | Published : 2022
Open access
Abstract
Quasi-2D Ruddlesden–Popper perovskites (RPPs) are candidates for constructing perovskite solar cells (PSCs) with superior stability due to their tolerance to the external environment. Fully understanding the film growth mechanism and structure is crucial to further improve the performance of 2D-PSCs while maintaining device stability. In this work, the origin of Brownian tree-shaped dendrites formed in hot-cast methylammonium chloride (MACl)-doped BA2MAn−1PbnI3n+1 ( = 5) quasi-2D perovskite films are reported. Investigations based on optical, electronic, atomic force, and fluorescence microscopies reveal that the dendrites are assembled from large-n RPPs-dominated grains, while the nondendri..
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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.A.S., M.G., and D.A. acknowledge support from the Australian Centre for Advanced Photovoltaics (ACAP) program funded by the Australian Government through the Australian Renewable Energy Agency (ARENA), and the Industrial Innovation Program of CSIRO Manufacturing. GIWAXs measurements were undertaken on the SAXS/WAXS beamline at the Australian Synchrotron facilities, part of ANSTO. Open access publishing facilitated by The University of Melbourne, as part of the Wiley -The University of Melbourne agreement via the Council of Australian University Librarians.