Nanogenerators based on piezoelectric GaN nanowires grown by PA-MBE and MOCVD

Abstract

In this work, we fabricate and characterize piezogenerators based on GaN nanowire (NW) arrays. We integrate GaN NWs grown by either Plasma Assisted Molecular Beam Epitaxy (PA-MBE) or Metal Organic Chemical Vapor Deposition (MOCVD) techniques into a polymeric matrix to explore piezogeneration of rigid and flexible devices. Both types of devices show high sensitivity to external forces and mechanical robustness. With an enhanced mechanic-electrical conversion efficiency, these devices are good candidates for energy harvesting and force sensing applications.