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American Institute of Physics, Applied Physics Letters, 11(101), p. 111607

DOI: 10.1063/1.4752723

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A photoelectron spectroscopy study of the electronic structure evolution in CuInSe2-related compounds at changing copper content

Journal article published in 2012 by T. V. Kuznetsova ORCID, V. I. Grebennikov, H. Zhao, C. Derks, C. Taubitz, M. Neumann, C. Persson, M. V. Kuznetsov, I. V. Bodnar, R. W. Martin ORCID, M. V. Yakushev
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This paper is available in a repository.

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Abstract

Evolution of the valence-band structure at gradually increasing copper content has been analysed by x-ray photoelectron spectroscopy (XPS) in In{sub 2}Se{sub 3}, CuIn{sub 5}Se{sub 8}, CuIn{sub 3}Se{sub 5}, and CuInSe{sub 2} 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.