Piezoelectric MEMS vibration energy harvester using BiFeO₃ film and dynamic magnifier for impulsive forces.

ABSTRACT: Resonant-type piezoelectric vibration energy harvesters (pVEHs) can achieve high energy conversion efficiency and output power density by using resonance phenomena with external vibrations at constant frequencies. However, this approach is less effective for the random vibrations commonly encountered in real-world environments, thus limiting its practical applications. This study employs impulsive forces and a two-degree-of-freedom system with a dynamic magnifier (DM) to enhance the output power of a nonresonant microelectromechanical systems-based pVEH (MEMS-pVEH). Lead-free BiFeO₃ (BFO) was selected as the piezoelectric thin film due to its considerable figure of merit in energy conversion applications. We investigated the electromechanical properties of the BFO-based MEMS-pVE

SUBMITTER: Aphayvong S 

PROVIDER: S-EPMC12834955 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature