A sandwich-like structural model revealed for quasi-2D perovskite films dagger
Fei Zheng, Christopher R Hall, Dechan Angmo, Chuantian Zuo, Sergey Rubanov, Zhenchuan Wen, Siobhan J Bradley, Xiao-Tao Hao, Mei Gao, Trevor A Smith, Kenneth P Ghiggino
JOURNAL OF MATERIALS CHEMISTRY C | ROYAL SOC CHEMISTRY | Published : 2021
The excellent performance and stability of perovskite solar cells (PSCs) based on quasi-2D Ruddlesden-Popper perovskites (RPPs) holds promise for their commercialization. Further improvement in the performance of 2D PSCs requires a detailed understanding of the microstructure of the quasi-2D perovskite films. Based on scanning transmission electron microscopy (STEM), time-resolved photoluminescence, and transient absorption measurements, a new sandwich-like structural model is proposed to describe the phase distribution of RPPs. In contrast to the conventional gradient distribution, it is found that small-nRPPs are sandwiched between large-nRPP phase layers at the front and back sides owing ..View full abstract
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Awarded by ARC Centre of Excellence in Exciton Science
Funding support from the ARC Centre of Excellence in Exciton Science (CE170100026) is acknowledged. T. A. S., M. G., D. A. and C. Z. 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.