Nanogenerator Output

Nanogenerator based on vertical nanowire is a simple and dominant structure for mechanical energyharvesting. For Zinc Oxide nanowire, that is grown along c-axis and compressed with compressive force, piezoelectriccoefficient d33 has significant role to increasing piezoelectric potential. Thus, study of effective piezoelectriccoefficient may use for improving performance of the piezoelectric nanogenerators. In this work, influence ofgeometric parameters (including nanowire radius, nanowire length, and nanowire aspect ratio) on effectivepiezoelectric coefficient (d eff 33) in ZnO nanowire is investigated using Finite Element Method (FEM). By decreasing the nanowire radius, stress will be restricted and the d eff 33 approaches d33 more rapidly and leads to increase the piezoelectric potential. The length and the aspect ratio changes, don’t have significant influence on the d eff 33.

Keywords:

piezoelectric coefficient , piezoelectric potential , ZnO nanowire