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

T. V. Kuznetsova, V. I. Grebennikov, H. Zhao, C. Derks, C. Taubitz, M. Neumann, C. Persson, M. V. Kuznetsov, I. V. Bodnar, R. W. Martin, M. V. Yakushev

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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 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. 

Original languageEnglish
Article number111607
Number of pages4
JournalApplied Physics Letters
Volume101
Issue number11
DOIs
Publication statusPublished - 10 Sep 2012

Keywords

  • photoelectron spectroscopy study
  • electronic structure evolution
  • CuInSe2-related compounds
  • changing copper content
  • CUINSE2

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