A review on ZnO-based piezoelectric nanogenerators: Synthesis, characterization techniques, performance enhancement and applications

ZnO nanorods (NRs) have received a tremendous amount of attention in the last decade for mechanical energy harvesting devices due to its outstanding semiconducting and piezoelectric properties, low cost, relative abundance, chemical stability towards the air, a biocompatible and in-complex and huge variety of crystal-growth technologies. This review summarizes the development of ZnO-based piezoelectric nanogenerators (PNGs) from synthesis to...