Fabrication and electrical characterization of TiO2NT/RGO/Pd hybrid structure

Abstract

In the present work, the room temperature electrical characterization ((a) Current-Voltage (I-V) and (b) Capacitance-Voltage (C-V)) of the ternary hybrid junction based on Pd nanoparticles, Reduced Graphene Oxide (RGO) and TiO2 nanotubes is being reported. The heterojunction was fabricated by growing TiO2 oxide layer on Ti substrate by anodization method. Electrochemically derived TiO2 nanotubes were almost partially covered by transparent RGO layer, on top of which Pd nanoparticles were dispersed randomly. Structural, morphological and optical characterization like XRD, FESEM and PL were carried out in order to investigate the crystallinity, morphological feature and band gap of the grown film. Beside this, low barrier schottky nature and MOS capacitor like feature was confirmed respectively from the current-voltage characteristics (I-V) and capacitance-voltage (C-V) characteristics of the heterojunction of Au/(Pd/RGO/TiO2)/Ti based hybrid device respectively. Calculated the low threshold voltage of the device, as calculated from I-V and C-V plot, makes it useful for high performance and low power operation.