The Impact of Piezoelectricity in Low Dimensional Metal Halide Perovskite

Stav Rahmany, Adva Shpatz Dayan, Małgorzata Wierzbowska, Amanda Jiamin Ong, Yun Li, Shlomo Magdassi, Alfred Iing Yoong Tok, Lioz Etgar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Hybrid perovskites show piezoelectric properties due to polarization and centro-symmetry breaking of PbX6 pyramids (X = I-, Br-, Cl-). This study examines the piezoelectric response of quasi-2D perovskites using various barrier molecules: benzyl amine (BzA), phenylethyl amine (PEA), and butyl diamine (BuDA). Utilizing piezoelectric force microscopy measurements, we determine the piezoelectric coefficient (d33) where BuDA exhibits a substantial response with values of 147 pm V-1 for n = 5, better than the other quasi-2D and 3D perovskite counterparts. Density functional theory calculations reveal distorted bond angles in the PbBr6 pyramids for quasi-2D perovskites, enhancing symmetry breaking. Additionally, polarizabilities and dielectric constants, derived from ab initio many-body perturbation theory, are highest for BuDA, followed by PEA and BzA, aligning with experimental results. We demonstrate pressure sensor performance, emphasizing the quicker capacitance decay time of the quasi-2D perovskite based on BuDA. This research underscores the impact of perovskite dimensionality on piezoelectricity, paving the way for the development of sensitive and wide-ranging pressure sensors.

Original languageAmerican English
Pages (from-to)1527-1536
Number of pages10
JournalACS Energy Letters
DOIs
StateAccepted/In press - 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society.

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