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Low‐frequency energy harvesters made from double‐layer PZT thick films on titanium plate (Phys. Status Solidi A 2∕2017)
Author(s) -
Wang Chu,
Cao Ziping,
Luo Jun,
Zhang Jinya,
Yuan Ming
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201770110
Subject(s) - piezoelectricity , energy harvesting , materials science , cantilever , vibration , fabrication , acoustics , electrical engineering , optoelectronics , natural frequency , layer (electronics) , electricity , energy (signal processing) , microelectromechanical systems , engineering physics , engineering , nanotechnology , composite material , physics , medicine , alternative medicine , pathology , quantum mechanics
Portable electronic terminals and wireless sensors, which play a crucial role in our daily lives, have a limited battery life, representing a very important design problem. Therefore, the prospect of converting ambient energy into electricity is attractive, and several energy harvesting sources are available, including solar, vibration, and others. Environmental vibration, which can provide relatively high energy density, is most often harvested by Piezoelectric harvesters, mainly due to their simpler architecture and higher energy‐converting efficiency. For practical application, piezoelectric harvesters should have both low natural frequency and small device dimensions. But, for example, for a typical Sibased piezoelectric harvester the thickness of the Si beam should be only a few micrometers and its free end should be attached to a heavy proof mass, to ensure its low nature frequency. However, due to high brittleness of Si such a harvester will be extremely vulnerable. Chu Wang et al. (article No. 1600444 ) fabricated a series of Ti‐based piezoelectric harvesters and in effort to secure both of the above mentioned characteristics the cantilever structure was used for fabrication. The results show that the authors' harvester has highly favorable piezoelectric performance and low resonant frequency.