Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164939
Title: Pressure driven rotational isomerism in 2D hybrid perovskites
Authors: Yin, Tingting
Yan, Hejin
Ibrahim Abdelwahab
Lekina, Yulia
Lu, Xujie
Yang, Wenge
Sun, Handong
Leng, Kai
Cai, Yongqing
Shen, Ze Xiang
Loh, Kian Ping
Keywords: Science::Physics
Issue Date: 2023
Source: Yin, T., Yan, H., Ibrahim Abdelwahab, Lekina, Y., Lu, X., Yang, W., Sun, H., Leng, K., Cai, Y., Shen, Z. X. & Loh, K. P. (2023). Pressure driven rotational isomerism in 2D hybrid perovskites. Nature Communications, 14(1), 411-. https://dx.doi.org/10.1038/s41467-023-36032-y
Project: NRF-CRP21-2018-0007 
NRF-CRP23-2019-0007 
MOE-T2EP50220- 0020 
RG57/21 
RG156/19 
Journal: Nature communications 
Abstract: Multilayers consisting of alternating soft and hard layers offer enhanced toughness compared to all-hard structures. However, shear instability usually exists in physically sputtered multilayers because of deformation incompatibility among hard and soft layers. Here, we demonstrate that 2D hybrid organic-inorganic perovskites (HOIP) provide an interesting platform to study the stress-strain behavior of hard and soft layers undulating with molecular scale periodicity. We investigate the phonon vibrations and photoluminescence properties of Ruddlesden-Popper perovskites (RPPs) under compression using a diamond anvil cell. The organic spacer due to C4 alkyl chain in RPP buffers compressive stress by tilting (n = 1 RPP) or step-wise rotational isomerism (n = 2 RPP) during compression, where n is the number of inorganic layers. By examining the pressure threshold of the elastic recovery regime across n = 1-4 RPPs, we obtained molecular insights into the relationship between structure and deformation resistance in hybrid organic-inorganic perovskites.
URI: https://hdl.handle.net/10356/164939
ISSN: 2041-1723
DOI: 10.1038/s41467-023-36032-y
Schools: School of Physical and Mathematical Sciences 
Rights: © 2023 The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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