What is it about?

Low-cost, light weight, flexible relaxor ferroelectric polymers and nanocomposites enable flexible, wearable and biocompatible devices in acoustic sensors, transducers and actuators. Here we provide the physical insights into the role of defects induced by various monomers at the molecular level on the physical properties and the structure–property relationship of defect-modified ferroelectric polymers. We focus on the fundamentals of the different structural defects on tailoring the dielectric, ferroelectric, electromechanical, and electrocaloric properties, along with the device performance enhancement in capacitors, actuators, and solid-state cooling.

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Why is it important?

Recent works further demonstrate that the defects are of critical importance in modifying the energy landscape of different crystalline phases of PVDF-based ferroelectric polymers and effectively manipulating their ferroelectric properties. However, review articles on ferroelectric polymers based on defect engineering are not available to the best of our knowledge. This review summarizes recent advances in defect-modified ferroelectric polymers, especially during the past 5 years.

Perspectives

We offer insightful perspectives on the challenges and opportunities in this rapidly evolving field. The underlying mechanisms revealed in the article are anticipated to guide future fundamental and applied studies of ferroelectric polymers that capitalize on defect engineering for electronic and energy applications.

Yang Liu
Huazhong University of Science and Technology

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This page is a summary of: Defects in poly(vinylidene fluoride)-based ferroelectric polymers from a molecular perspective, Applied Physics Reviews, September 2022, American Institute of Physics, DOI: 10.1063/5.0097446.
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