Anisotropy of effective masses in CuInSe2

Michael V Yakushev, Franziska Luckert, A.V. Rodina, C. Faugeras, A.V. Karotki, A.V. Mudryi, Robert Martin

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11 Citations (Scopus)
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Abstract

Anisotropy of the valence band is experimentally demonstrated in CuInSe2, a key component of
the absorber layer in one of the leading thin-film solar cell technology. By changing the orientation
of applied magnetic fields with respect to the crystal lattice, we measure considerable differences
in the diamagnetic shifts and effective g-factors for the A and B free excitons. The resulting free
exciton reduced masses are combined with a perturbation model for non-degenerate independent
excitons and theoretical dielectric constants to provide the anisotropic effective hole masses,
revealing anisotropies of 5.5 (4.2) for the A (B) valence bands.
Original languageEnglish
Article number262101
Number of pages4
JournalApplied Physics Letters
Volume101
DOIs
Publication statusPublished - 26 Dec 2012

Keywords

  • anisotropy
  • CuInSe2
  • effective masses
  • valence band
  • thin-film solar cell technology
  • applied magnetic fields
  • crystal lattice

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