Optimizing and Enhancing Piezoelectric Energy Harvesting Devices Chaymae Amri, Khawla Gaouzi, Abdelilah Jilbab, My Hachem el Yousfi Alaoui and Lahcen Azrar E3S Web Conf., 601 (2025) 00019 Published online: 16 January 2025 DOI: 10.1051/e3sconf/202560100019