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

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.