The increasing demand for self-powered microelectronic devices, such as wireless sensors, biomedical implants, and Internet of Things (IoT) systems, has intensified research into energy harvesting technologies. Piezoelectric energy harvesters (PEHs) have gained significant attention due to their ability to convert mechanical vibrations into electrical energy, offering a viable solution for powering low-power electronics. However, at the micro-scale, conventional PEH designs face challenges related to low power density, limited bandwidth, and mechanical inefficiencies.

Recent advancements in microfabrication and material engineering have enabled the development of innovative geometric configurations that enhance energy conversion efficiency. By optimizing structural designs, such as cantilever arrays, nonlinear resonators, and multi-layered configurations, researchers are overcoming limitations in frequency response and power output. This research area is crucial for improving the feasibility of PEHs in real-world applications, paving the way for more efficient and autonomous micro-scale energy harvesting systems.

Micro-scale piezoelectric energy harvesters (PEHs) hold great promise for powering autonomous microsystems, yet their efficiency remains limited by low power output, narrow operational bandwidth, and mechanical constraints. Traditional PEH designs often struggle to effectively capture and convert ambient vibrations into usable electrical energy, particularly in low-frequency or variable-frequency environments. Addressing these limitations is critical to advancing the practical application of micro-scale energy harvesting technologies.

The goal of this Research Topic is to explore innovative geometric design strategies that enhance the performance of micro-scale PEHs. By investigating novel configurations such as nonlinear resonators, multi-beam structures, and hybrid material systems, researchers can improve strain distribution, increase frequency adaptability, and maximize energy conversion efficiency. Additionally, integrating computational modeling, experimental validation, and emerging fabrication techniques can further refine these designs.

By bringing together experts in microengineering, materials science, and energy harvesting, this research initiative aims to accelerate the development of next-generation micro-scale PEHs, making them more viable for powering IoT devices, biomedical implants, and other self-sustaining microsystems.

This Research Topic focuses on advancing micro-scale piezoelectric energy harvesters (PEHs) through innovative geometric design approaches to enhance energy conversion efficiency. We invite contributions that explore novel structural configurations, multi-modal energy harvesting techniques, and the integration of advanced materials to optimize performance. Key themes include, but are not limited to:

• Geometric innovations in PEH design, including nonlinear and multi-layered structures

• Broadband and multi-frequency harvesting strategies for improved adaptability

• Computational modeling and optimization techniques for performance enhancement

• Microfabrication methods for advanced PEH architectures

• Experimental validation and real-world applications of micro-scale PEHs

We welcome original research articles, review papers, perspective pieces, and experimental studies that contribute to the development of efficient micro-scale PEHs. By fostering interdisciplinary collaboration, this Research Topic aims to drive innovation in self-powered microsystems for IoT, biomedical, and industrial applications.

Are you interested in contributing a manuscript to this Research Topic?

Advancements in Micro-Scale Piezoelectric Energy Harvesters: Exploring Geometric Innovations for Enhanced Performance