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Capacitance-voltage curves for the Al/PI/multilayered nanoparticle array/PI/ (100) device obtained by sweeping with various applied voltage ranges.
Current-voltage curves for the Al/PI/multilayered nanoparticle array/PI/ (100) device obtained by sweeping with the forward applied voltage from and with the reverse applied voltage from (inset). Empty circles represent the experimental data, and the solid lines indicate the fitting curves.
Experimental and theoretical flatband voltage shifts as functions of the applied voltage obtained from the capacitance-voltage curves. The error bars represent the error deviations of the data.
Schematic diagrams of the electronic structures corresponding to the (a) charging and the (b) discharging processes for an Al/PI/multilayered nanoparticle array/PI/ (100) device. The represents the Fermi energy level of the multilayered nanoparticles. The LUMO and the HOMO represent the energy levels of the lowest unoccupied molecular orbital and the highest occupied molecular orbital of the polyimide layer, respectively.
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