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Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance

Improvement of energy harvesting performance from flexible thin film-based energy harvesters is essential to accomplish future self-powered electronics and sensor systems. In particular, the integration of harvesting signals should be established as a single device configuration without complicated...

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Detalles Bibliográficos
Autores principales: Han, Jae Hyun, Park, Kwi-Il, Jeong, Chang Kyu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470648/
https://www.ncbi.nlm.nih.gov/pubmed/30909637
http://dx.doi.org/10.3390/s19061444
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author Han, Jae Hyun
Park, Kwi-Il
Jeong, Chang Kyu
author_facet Han, Jae Hyun
Park, Kwi-Il
Jeong, Chang Kyu
author_sort Han, Jae Hyun
collection PubMed
description Improvement of energy harvesting performance from flexible thin film-based energy harvesters is essential to accomplish future self-powered electronics and sensor systems. In particular, the integration of harvesting signals should be established as a single device configuration without complicated device connections or expensive methodologies. In this research, we study the dual-film structures of the flexible PZT film energy harvester experimentally and theoretically to propose an effective principle for integrating energy harvesting signals. Laser lift-off (LLO) processes are used for fabrication because this is known as the most efficient technology for flexible high-performance energy harvesters. We develop two different device structures using the multistep LLO: a stacked structure and a double-faced (bimorph) structure. Although both structures are well demonstrated without serious material degradation, the stacked structure is not efficient for energy harvesting due to the ineffectively applied strain to the piezoelectric film in bending. This phenomenon stems from differences in position of mechanical neutral planes, which is investigated by finite element analysis and calculation. Finally, effectively integrated performance is achieved by a bimorph dual-film-structured flexible energy harvester. Our study will foster the development of various structures in flexible energy harvesters towards self-powered sensor applications with high efficiency.
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spelling pubmed-64706482019-04-26 Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance Han, Jae Hyun Park, Kwi-Il Jeong, Chang Kyu Sensors (Basel) Article Improvement of energy harvesting performance from flexible thin film-based energy harvesters is essential to accomplish future self-powered electronics and sensor systems. In particular, the integration of harvesting signals should be established as a single device configuration without complicated device connections or expensive methodologies. In this research, we study the dual-film structures of the flexible PZT film energy harvester experimentally and theoretically to propose an effective principle for integrating energy harvesting signals. Laser lift-off (LLO) processes are used for fabrication because this is known as the most efficient technology for flexible high-performance energy harvesters. We develop two different device structures using the multistep LLO: a stacked structure and a double-faced (bimorph) structure. Although both structures are well demonstrated without serious material degradation, the stacked structure is not efficient for energy harvesting due to the ineffectively applied strain to the piezoelectric film in bending. This phenomenon stems from differences in position of mechanical neutral planes, which is investigated by finite element analysis and calculation. Finally, effectively integrated performance is achieved by a bimorph dual-film-structured flexible energy harvester. Our study will foster the development of various structures in flexible energy harvesters towards self-powered sensor applications with high efficiency. MDPI 2019-03-24 /pmc/articles/PMC6470648/ /pubmed/30909637 http://dx.doi.org/10.3390/s19061444 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Han, Jae Hyun
Park, Kwi-Il
Jeong, Chang Kyu
Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title_full Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title_fullStr Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title_full_unstemmed Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title_short Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
title_sort dual-structured flexible piezoelectric film energy harvesters for effectively integrated performance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470648/
https://www.ncbi.nlm.nih.gov/pubmed/30909637
http://dx.doi.org/10.3390/s19061444
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