The aim of the project described in the following consists on the fabrication, optimization and characterization of ultraviolet (UV) photodetectors based on wide band gap (WBG) semiconductors. The fabrication will imply devices based only zinc oxide (ZnO) nanoparticles based devices. The process consist of wafer level patterning of metallic electrodes to contact the ZnO nanoparticle film. The last step performed involves the deposition of the metal nanoparticles through the combination of spark ablation and impaction printing technology trying to create a conductive path between electrodes at die level. The obtained devices undergo a thermal treatment in order to fully oxidize the zinc particles and thus obtaining only a zinc oxide phase, taking into account the temperature effect on the metal electrodes.