Abstract
An organic /inorganic composite electrical bistable device with the sandwich structure of ITO / PVP /ZnO nanocrystal(NCs) /PbS nanocrystal(NCs) /PVP /Al was fabricated.Compared with the device structure of ITO /PVP /ZnO NPs /PVP /Al,the ON /OFF ratio of target device was improved by 2 orders of magnitude.The carrier transportation and resistance switching mechanism of device were discussed via I-V characteristics and the energy band structures of the devices.The effective capture /release of electrons could be attributed to the optimization of device structure and modification of ZnO NCs surface by PbS NCs layer.
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