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characteristics of the heterojunction. The insets show the schematic diagram of the heterostructure (top left) and characteristics between two gold contacts on ZnO (bottom right).
(a) Log-log plots of the injection current vs voltage in forward bias and inset shows the semilog plot of dark current vs voltage in forward bias. (b) The energy band diagram of the junction at zero bias. (c) Plots of transmittance spectra and square of the product of absorption coefficient and energy vs energy.
Photocurrent and photocapacitance spectra at bias voltage.
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