A photoelectron spectroscopy study of the electronic structure evolution in CuInSe2-related compounds at changing copper content
- Kuznetsova, T. V.
- Grebennikov, V. I.
- Zhao, H.
- Derks, C.
- Taubitz, C.
- Neumann, M.
- Persson, C.
- Kuznetsov, M. V.
- Bodnar, I. V.
- Martin, R. W.
- Yakushev, M. V.
DOIAbstract
Evolution of the valence-band structure at gradually increasing copper content has been analysed by x-ray photoelectron spectroscopy (XPS) in In2Se3, CuIn5Se8, CuIn3Se5, and CuInSe2 single crystals. A comparison of these spectra with calculated total and angular-momentum resolved density-of-states (DOS) revealed the main trends of this evolution. The formation of the theoretically predicted gap between the bonding and non-bonding states has been observed in both experimental XPS spectra and theoretical DOS
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