a film is presented having super - pyroelectric properties . the film comprises nano - sized grains being in a ferroelectric phase and having at least three different crystallographic variants defining at least two polycrystalline macro - domains . the film is shaped to define at least one film region with the macro - domains of a predetermined shape and different orientations of crystallographic axes with respect to the film &# 39 ; s surface , thereby enabling to apply a temperature change to the film to induce movement of the polycrystalline macro - domains boundaries enabling super - pyroelectric properties .