A simple and efficient visible light photodetector based on Co3O4/ZnO composite

Herein, we propose for the first time visible light photodetector based on n-type ZnO nanorods decorated with p-type Co3O4 nanowires. The heterojunction was fabricated fluorine doped tin oxide (FTO) glass substrate by low temperature aqueous chemical growth method. exhibits nanorod morphology and cobalt possesses nanowire shape sharp tail. Energy dispersive spectroscopy confirmed presence of Zn, O, Co elements in heterojunction. have hexagonal cubic phases, respectively, as XRD. dense perpendicular are acting a scattering layer light, while nanowires act visible-light absorber. all p–n junction can operate photodetector. Furthermore, also shows reproducible fast response detection light. Optimization device is needed (presence buffer layers, tuning thickness optical absorber) to improve its functionalities.