Origin of high piezoelectricity of inorganic halide perovskite thin films and their electromechanical energy-harvesting and physiological current-sensing characteristics

Da Bin Kim, Kwan Hyun Park, Yong Soo Cho

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Halide perovskite materials have been recently recognized to possess potentially strong ferroelectricity and piezoelectricity even though the experimental evidence is very limited. Herein, we report high piezoelectricity of representative inorganic halide CsPbBr3 thin films and their energy harvesting and current-sensing characteristics with an optimization process. This is the very first report of introducing an effective piezoelectric coefficient and energy-harvesting performance for inorganic halide perovskites. A record high piezoelectric coefficient of ∼40.3 pm V-1 was obtained for the optimized CsPbBr3, which was attributed to the extended bonding angles of Pb-Br-Pb and Br-Pb-Pb arising from the applied electric field according to structural simulations. As expected from the high piezoelectricity, the electromechanical energy-harvesting performance was very competitive with excellent values of a ∼16.4 V output voltage and ∼604 nA output current achieved for a large-scale harvester of 5 cm2. Highly strain-sensitive devices were also successfully exemplified to identify specific body-motion from the detected current values in the sensitive inorganic halide patches.

Original languageEnglish
Pages (from-to)2077-2086
Number of pages10
JournalEnergy and Environmental Science
Volume13
Issue number7
DOIs
Publication statusPublished - 2020 Jul

Bibliographical note

Funding Information:
This work was financially supported by grants from the National Research Foundation of Korea (NRF-2016M3A7B4910151), the Industrial Strategic Technology Development Program (#10079981), and the Creative Materials Discovery Program, supported by the Ministry of Science and ICT (2018M3D1A1058536).

Publisher Copyright:
© 2020 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

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