Abstract: The present invention relates to a energy conversion device (100) configured to convert a light signal into an electrical signal, comprising: an actuator element (50), substantially planar, having at least one activatable portion (30), said activatable portion comprising a photomobile polymeric material; a transducer element (60), substantially planar, having at least a portion of piezoelectric material; wherein said actuator element (50) is coupled to said transducer element (60) so that, at a light beam incident on said photomobile polymeric material, a movement of said transducer element (60) is activated through a movement of said activatable portion (30), said movement of said transducer element (60) providing the generation of a potential difference at the terminal ends of said portion of piezoelectric material. The present invention also relates to a method of production of the aforesaid device.