ar X iv : 1 00 4 . 10 80 v 1 [ co nd - m at . m tr l - sc i ] 7 A pr 2 01 0 Indium - Gallium Segregation in CuIn

نویسندگان

  • Christian D. R. Ludwig
  • Thomas Gruhn
  • Claudia Felser
  • Tanja Schilling
  • Johannes Windeln
  • Peter Kratzer
چکیده

Thin-film solar cells with CuInxGa1−xSe2 (CIGS) absorber are still far below their efficiency limit, although lab cells reach already 19.9%. One important aspect is the homogeneity of the alloy. Large-scale simulations combining Monte Carlo and density functional calculations show that two phases coexist in thermal equilibrium below room temperature. Only at higher temperatures, CIGS becomes more and more a homogeneous alloy. A larger degree of inhomogeneity for Ga-rich CIGS persists over a wide temperature range, which may contribute to the low observed efficiency of Ga-rich CIGS solar cells.

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تاریخ انتشار 2010