Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance
1
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
2
School of Materials Science and Engineering, Kyungpook National University, Daegu 41566, Korea
3
Division of Advanced Materials Engineering, Chonbuk National University, Jeonju, Jeonbuk 54896, Korea
4
Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeonju, Jeonbuk 54896, Korea
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(6), 1444; https://doi.org/10.3390/s19061444
Received: 7 February 2019
/
Revised: 15 March 2019
/
Accepted: 20 March 2019
/
Published: 24 March 2019
(This article belongs to the Special Issue Flexible and Stretchable Piezoelectric Devices for Mechanical Sensing and Energy Harvesting)
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.
View Full-Text
Keywords:
energy harvesting; piezoelectric; self-powered device; self-powered sensor; PZT film; flexible; laser lift-off; bending; mechanical neutral plane; finite element analysis
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
- Supplementary File 1:
PDF-Document (PDF, 306 KiB)
MDPI and ACS Style
Han, J.H.; Park, K.-I.; Jeong, C.K. Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance. Sensors 2019, 19, 1444. https://doi.org/10.3390/s19061444
AMA Style
Han JH, Park K-I, Jeong CK. Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance. Sensors. 2019; 19(6):1444. https://doi.org/10.3390/s19061444
Chicago/Turabian StyleHan, Jae H., Kwi-Il Park, and Chang K. Jeong. 2019. "Dual-Structured Flexible Piezoelectric Film Energy Harvesters for Effectively Integrated Performance" Sensors 19, no. 6: 1444. https://doi.org/10.3390/s19061444
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
