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Title: Bond engineering of molecular ferroelectrics renders soft and high-performance piezoelectric energy harvesting materials
Authors: Hu, Yuzhong
Parida, Kaushik
Zhang, Hao
Wang, Xin
Li, Yongxin
Zhou, Xinran
Morris, Samuel Alexander
Liew, Weng Heng
Wang, Haomin
Li, Tao
Jiang, Feng
Yang, Mingmin
Alexe, Marin
Du, Zehui
Gan, Chee Lip
Yao, Kui
Xu, Bin
Lee, Pooi See
Fan, Hong Jin
Keywords: Engineering::Materials
Issue Date: 2022
Source: Hu, Y., Parida, K., Zhang, H., Wang, X., Li, Y., Zhou, X., Morris, S. A., Liew, W. H., Wang, H., Li, T., Jiang, F., Yang, M., Alexe, M., Du, Z., Gan, C. L., Yao, K., Xu, B., Lee, P. S. & Fan, H. J. (2022). Bond engineering of molecular ferroelectrics renders soft and high-performance piezoelectric energy harvesting materials. Nature Communications, 13(1), 5607-.
Project: A20E5c0086 
Journal: Nature Communications 
Abstract: Piezoelectric materials convert mechanical stress to electrical energy and thus are widely used in energy harvesting and wearable devices. However, in the piezoelectric family, there are two pairs of properties that improving one of them will generally compromises the other, which limits their applications. The first pair is piezoelectric strain and voltage constant, and the second is piezoelectric performance and mechanical softness. Here, we report a molecular bond weakening strategy to mitigate these issues in organic-inorganic hybrid piezoelectrics. By introduction of large-size halide elements, the metal-halide bonds can be effectively weakened, leading to a softening effect on bond strength and reduction in polarization switching barrier. The obtained solid solution C6H5N(CH3)3CdBr2Cl0.75I0.25 exhibits excellent piezoelectric constants (d33 = 367 pm/V, g33 = 3595 × 10-3 Vm/N), energy harvesting property (power density is 11 W/m2), and superior mechanical softness (0.8 GPa), promising this hybrid as high-performance soft piezoelectrics.
ISSN: 2041-1723
DOI: 10.1038/s41467-022-33325-6
Rights: © 2022 Crown. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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