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Schematic diagrams of the nanoparticles and the fabricated device studied in this study.
Current-voltage curves for the device. The scanning step of the applied voltage is . Empty and filled rectangles represent the current-voltage curves of the forward and the reverse applied bias voltages, respectively. The solid line indicates the current-voltage curve after application of a reverse voltage pulse of .
Capacitance-voltage curves for the devices with the active layer thicknesses of (a) and (b) .
Schematic diagram of the electronic structures corresponding to the operating mechanism for the device under a positive bias voltage. The energy levels for the core/shell-type nanoparticles are taken from the literature of Ref. 24.
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