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(a) Photoelectron spectrum of a film, wherein the threshold value of the photon energy corresponds to the ionization potential and (b) the energy band diagram of an -type -type Si heterojunction.
characteristics of a heterojunction measured at a signal frequency of 1 MHz. The inset shows the plot of against bias voltage.
characteristics of a heterojunction measured in the dark and under the illumination of a 6-mW laser at 300 K.
External quantum efficiency vs reverse voltage measured under illumination at a wavelength of . The inset shows the photoresponse spectrum measured at zero bias and 300 K in the NIR region.
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