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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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