Production and characterization of GO: Se nanoparticles produced by biosynthesis method and current-voltage characteristics of the Ag/GO: Se/p-Si device developed by using GO: Se nanoparticles

Recently, nanoparticle production through the use of green synthesis method as well as the known methods used in the production of nanoparticles has attracted a great deal of interest by researchers. In this recent research, it was first, achieved to produce graphene oxide: selenium nanoparticles (GO: Se-NPs) employing a new approach of green synthesis method using special bacteria OG1 in Luria-Bertani medium under dark conditions in literature. Applying this method, biosynthesized GO: Se-NPs solution was obtained. GO: Se thin film was formed dropping this solution on the p-Si substrate, and then it was annealed. Optical, structural, morphological, chemical composision properties of GO: Se nanostructural thin film was determined by commonly preferred as UV-VIS, XRD, and FE-SEM with EDS techniques. UV-VIS measurements showed that the band gap energy, Eg, of the GO: Se thin film is 1.70 eV and this value is firstly determined with this study in literature. XRD measurements revealed that GO: Se/p-Si structure has a particle nano size polycrystal structure. FE-SEM measurements have indicated that GO: Se thin film has a typically nano sheeted structure and distribution of the grains which are very homogeneous and uniform. Furthermore, Current-Voltage (I-V) measurements proved that GO: Se/p-Si heterostructure with rectifying contact of Ag and ohmic contact of Al exhibits a diode characteristic behavior.