Relationship between Output Current and Surface Potential in Self-Assembled Electret-Based Vibrational Energy Harvester

Electret-based vibrational energy harvesters (VEHs) have attracted much attention as power sources for wireless sensors. Generally, a charging process is needed to make electret from dielectric materials. By utilizing spontaneous orientation polarization phenomena, recently, we developed self-assembled electret-based VEHs (SAE-VEHs), which do not require any charging process during preparation. A detailed understanding of the operation mechanism in SAE-VEHs is highly required to improve the device's performance. In this study, we propose a model for SAE-VEHs and discuss the relationship between the surface potential of SAE and the output current of SAE-VEH.