CdSe/CdS Core/Shell nanostructures were prepared by a new green chemical route using starch as capping agent. The structural and optical characterizations of quasi type-II CdSe/CdS Core/Shell film were done by HRTEM, AFM, UV-Vis and PL techniques. The Characteristics I-V curves of this junction confirmed the formation of Schottky contact between silver (Ag) and CdSe/CdS Core/Shell nanostructures. Intrinsic and contact behavior such as saturation current, barrier height, effective Richardson constant, electron affinity and ideality factor were calculated from the current-voltage characterization. The reverse saturation current was remarkably increased to 7.6 × 10 −4 Amp in the fabricated Schottky junction. The barrier height and ideality factor were estimated 0.925 eV and 1.52 respectively. An energy band gap diagram has been proposed as a transportation mechanism of tunneling electrons in between core/shell nanostructures and silver metal interfaces.

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