Paper Info
Title
Improved Multilayered (Bi,Sc)O 3 -(Pb,Ti)O 3 Piezoelectric Energy Harvesters Based on Impedance Matching Technique.
Abstract
As a piezoelectric material, (Bi,Sc)O-3-(Pb,Ti)O-3 ceramics have been tested and analyzed for sensors and energy harvester applications owing to their relatively high Curie temperature and high piezoelectric coefficient. In this work, we prepared optimized (Bi,Sc)O-3-(Pb,Ti)O-3 piezoelectric materials through the conventional ceramic process. To increase the output energy, a multilayered structure was proposed and designed, and to obtain the maximum output energy, impedance matching techniques were considered and tested. By varying and measuring the energy harvesting system, we confirmed that the output energies were optimized by varying the load resistance. As the load resistance increased, the output voltage became saturated. Then, we calculated the optimized output power using the electric energy formula. Consequently, we identified the highest output energy of 5.93 mu W/cm(2) at 3 M Omega for the quadruple-layer harvester and load resistor using the impedance matching system. We characterized and improved the electrical properties of the piezoelectric energy harvesters by introducing impedance matching and performing the modeling of the energy harvesting component. Modeling was conducted for the piezoelectric generator component by introducing the mechanical force dependent voltage sources and load resistors and piezoelectric capacitor connected in parallel. Moreover, the generated output voltages were simulated by introducing an impedance matching technique. This work is designed to explain the modeling of piezoelectric energy harvesters. In this model, the relationship between applied mechanical force and output energy was discussed by employing experimental results and simulation.
Year
DOI
Venue
2020
10.3390/s20071958
SENSORS
Keywords
DocType
Volume
(Bi,Sc)O-3-(Pb,Ti)O-3 ceramics,piezoelectric ceramics,impedance matching
Journal
20
Issue
ISSN
Citations 
7
1424-8220
0
PageRank 
References 
Authors
0.34
0
5
Name
Order
Citations
PageRank
Bo Su Kim100.34
Jae-Hoon Ji200.34
Hong-Tae Kim300.34
Sung-Jin Kim400.34
Jung-Hyuk Koh501.35