Piezoelectricity in chalcogenide perovskites

Sk Shamim Hasan Abir, Shyam Sharma, Prince Sharma, Surya Karla, Ganesh Balasubramanian, Johnson Samuel () and Nikhil Koratkar ()
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Sk Shamim Hasan Abir: Rensselaer Polytechnic Institute
Shyam Sharma: Rensselaer Polytechnic Institute
Prince Sharma: Lehigh University
Surya Karla: Rensselaer Polytechnic Institute
Ganesh Balasubramanian: University of New Haven
Johnson Samuel: Rensselaer Polytechnic Institute
Nikhil Koratkar: Rensselaer Polytechnic Institute

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Piezoelectric materials show potential to harvest the ubiquitous, abundant, and renewable energy associated with mechanical vibrations. However, the best performing piezoelectric materials typically contain lead which is a carcinogen. Such lead-containing materials are hazardous and are being increasingly curtailed by environmental regulations. In this study, we report that the lead-free chalcogenide perovskite family of materials exhibits piezoelectricity. First-principles calculations indicate that even though these materials are centrosymmetric, they are readily polarizable when deformed. The reason for this is shown to be a loosely packed unit cell, containing a significant volume of vacant space. This allows for an extended displacement of the ions, enabling symmetry reduction, and resulting in an enhanced displacement-mediated dipole moment. Piezoresponse force microscopy performed on BaZrS3 confirmed that the material is piezoelectric. Composites of BaZrS3 particles dispersed in polycaprolactone were developed to harvest energy from human body motion for the purposes of powering electrochemical and electronic devices.

Date: 2024
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DOI: 10.1038/s41467-024-50130-5

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