Evidence of Reversible Oxidation at CuInSe2 Grain Boundaries

Harvey Guthrey, Diego Colombara, Jean-Nicolas Audinot, Damien Aureau, Finn Babbe, Phillip Dale, Hossam Anzeery, Nicoleta Nicoara, Sascha Sadewasser, Deepanjan Sharma, Nathalie Valle, Tom Wirtz, Anastasiya Zelenina

Research output: Contribution to conferencePaperpeer-review

1 Scopus Citations


Effects related to alkali metal doping and grain boundaries have puzzled the chalcopyrite photovoltaics community for a long time. This study is the first to report reversible oxidation of grain boundaries in CuInSe2 thin films. The phenomenon is observed in sodium-doped films, but not in undoped ones. Cathodoluminescence imaging, secondary ion mass spectrometry and Kelvin probe force microscopy analyses are performed on CuInSe2 thin films before and after exposure to vacuum. The findings suggest the existence of yet unidentified solid-gas equilibria. Resolving the nature of such reactions will provide new insights into the mechanism of alkali metal doping and passivation in chalcopyrite solar cells.

Original languageAmerican English
Number of pages3
StatePublished - Jun 2019
Event46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States
Duration: 16 Jun 201921 Jun 2019


Conference46th IEEE Photovoltaic Specialists Conference, PVSC 2019
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

NREL Publication Number

  • NREL/CP-5K00-76283


  • Alkali PDT
  • CIGS
  • oxygenation
  • Solar energy


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