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Photocurrents and relative QEs from CsI/Si (◼) and CsI/MgO/MWCNTs/Si (◻) as a function of the bias voltage. The inset shows the experimental setup of the sample.
SEM image of the CsI/MgO/MWCNTs/Si electrode.
The photoelectron energy spectra and corresponding schematic energy diagrams of CsI/Si and CsI/MgO/MWCNTs/Si at a bias voltage of V . The sample was negatively biased and the analyzer was grounded. The left side arrow shows the estimated potential change through the MWCNTs and MgO/CsI vs vacuum.
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