Flexible Energy Harvester with Piezoelectric and Thermoelectric Hybrid Mechanisms for Sustainable Harvesting

  • Yongkeun Oh
  • Dae-Sung Kwon
  • Youngkee Eun
  • Wondo Kim
  • Min-Ook Kim
  • Hee-Jin Ko
  • Seong Gu Kang
  • Jongbaeg KimEmail author
Regular Paper


In this paper, we present a flexible hybrid energy harvester for single- or multi-source energy collection. To increase harvesting power, piezoelectric and thermoelectric conversions are used simultaneously. The piezoelectric portion of the harvester collects energy from low-frequency kinetic motion using frequency up-conversion. The thermoelectric part is suitable for harvesting energy from a curved surface, thanks to its flexibility. By harvesting from two different energy sources (kinetic and thermal), the harvester allows for sustainable energy harvesting. The average power density obtained was 28.57 and 0.64 μW/cm2 by piezoelectric and thermoelectric conversion, respectively.


Energy harvester Flexible harvester Hybrid Piezoelectric Thermoelectric 



This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIT) (No. NRF-2018R1A2A1A05023070, 2018R1A4A1025986).

Compliance with Ethical Standards

Conflict of Interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

Supplementary material

40684_2019_132_MOESM1_ESM.docx (501 kb)
Supplementary material 1 (DOCX 500 kb)


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  1. 1.School of Mechanical EngineeringYonsei UniversitySeoulRepublic of Korea
  2. 2.Korea Institute of Industrial Technology (KITECH)AnsanRepublic of Korea
  3. 3.Institute of Science and Technology at Korea University at SejongSejongRepublic of Korea

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