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A hemispheric analyzer is used to take the EDC of the electrons that are emitted perpendicular to the surface Band diagram of the NEA structure under an applied bias between the sample and analyzer.
EDC and EDC derivative from NEA for excitation energy at (Quantum yield 12%) Both the energy positions of valley at surface and bulk CBM (CBM ) are labeled.
EDC’s at from NEA for excitation energy (quantum yield for 15% at , 20% for on ). Curves are normalized to the same height. Both the energy positions of L–M valleys at surface () and bulk CBM (CBM ) are labeled.
Normalized EDC for . The Maxwell–Boltzmann distribution has been fitted to the experimental data. . The calculated distribution takes into account the energy resolution of the spectrometer( Gaussian).
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