@article {3175227,
	title = {The Impact of Piezoelectricity in Low Dimensional Metal Halide Perovskite},
	journal = {ACS Energy Letters},
	volume = {9},
	year = {2024},
	pages = {1527{\textendash}1536},
	abstract = {Hybrid perovskites show piezoelectric properties due to polarization and centro-symmetry breaking of PbX<sub>6</sub>\&nbsp;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 (d<sub>33</sub>) where BuDA exhibits a substantial response with values of 147 pm V<sup>{\textendash}1</sup>\&nbsp;for\&nbsp;<i>n</i>\&nbsp;= 5, better than the other quasi-2D and 3D perovskite counterparts. Density functional theory calculations reveal distorted bond angles in the PbBr<sub>6</sub>\&nbsp;pyramids for quasi-2D perovskites, enhancing symmetry breaking. Additionally, polarizabilities and dielectric constants, derived from\&nbsp;<i>ab initio</i>\&nbsp;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.},
	url = {https://doi.org/10.1021/acsenergylett.4c00177},
	author = {Stav Rahmany and Adva Shpatz Dayan and Ma{\l}gorzata Wierzbowska and Amanda Jiamin Ong and Yun Li and Shlomo Magdassi and Alfred Iing Yoong Tok and lioz etgar}
}
