Nature Communications (Feb 2018)

Sodium enhances indium-gallium interdiffusion in copper indium gallium diselenide photovoltaic absorbers

  • Diego Colombara,
  • Florian Werner,
  • Torsten Schwarz,
  • Ingrid Cañero Infante,
  • Yves Fleming,
  • Nathalie Valle,
  • Conrad Spindler,
  • Erica Vacchieri,
  • Germain Rey,
  • Mael Guennou,
  • Muriel Bouttemy,
  • Alba Garzón Manjón,
  • Inmaculada Peral Alonso,
  • Michele Melchiorre,
  • Brahime El Adib,
  • Baptiste Gault,
  • Dierk Raabe,
  • Phillip J. Dale,
  • Susanne Siebentritt

DOI
https://doi.org/10.1038/s41467-018-03115-0
Journal volume & issue
Vol. 9, no. 1
pp. 1 – 12

Abstract

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Sodium doping is necessary to achieve high performance in polycrystalline chalcopyrite solar cells, but retards gallium interdiffusion, and thus efficiency optimisation. Here, Colombara et al. show that in contrast to the polycrystalline case, sodium accelerates atomic interdiffusion in monocrystalline samples.