Microampere-level piezoelectric energy generation in Pb-free inorganic halide thin-film multilayers with Cu interlayers

Da Bin Kim, Kwan Sik Park, Sun Jae Park, Yong Soo Cho

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5 Citations (Scopus)


Although asymmetric perovskite halides are known to possess viable piezoelectricity, their performance of energy harvesting has been limitedly reported. Herein, we propose the first Pb-free inorganic halide-based thin film harvester having strong capability of power-generation, particularly with additional efforts to enhance the device performance using an unprecedented multilayer structure incorporated with metallic interlayers. Representative high-quality CsSnI3 thin films were prepared by one-step spin coating, and up to four layers were stacked with alternating Cu interlayers. Impressive piezoelectric energy harvesting characteristics of ~22.9 V and ~1233 nA were attained for the four-layered halide structure after poling, which are highest values recorded thus far for perovskite halide thin films. The origin of the enhanced energy-generation is believed to be directly associated with the increased SnI6-octahedra distortion (with off-centering of Sn atoms) by poling and the extra space-charge polarization by Cu interlayers.

Original languageEnglish
Article number106785
JournalNano Energy
Publication statusPublished - 2022 Feb

Bibliographical note

Funding Information:
This work was financially supported by grants from the National Research Foundation of Korea ( NRF-2021R1A2C2013501 and NRF-2020M3D1A2102913 ), the Creative Materials Discovery Program of the Ministry of Science and ICT ( 2018M3D1A1058536 ), and the Graduate School of 2020 Yonsei University Research Scholarship Grants.

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering


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