The term “piezo” originates from the Greek word for pressure, piezoelectricity meaning electricity (also from the Greek word “electron”) resulting from pressure. Broadly, piezoelectricity refers therefore to the association between a mechanical solicitation and the variation of the dipolar structure of a dielectric material, leading to surface charge variations and the generation of a voltage (direct piezoelectricity) or the correlation between the application of an electric field and a mechanical deformation (converse/indirect piezoelectricity).