Vacuum‐Healing of Grain Boundaries in Sodium‐Doped CuInSe2 Solar Cell Absorbers

• Published in: Advanced energy materials Vol. 13; no. 17
• Main Authors: Babbe, Finn, Nicoara, Nicoleta, Guthrey, Harvey, Valle, Nathalie, Ramirez Sanchez, Omar, Aureau, Damien, Elanzeery, Hossam, Sharma, Deepanjan, Virtuoso, José Luís, Audinot, Jean‐Nicolas, Zelenina, Anastasiya, Gharabeiki, Sevan, Wirtz, Tom, Siebentritt, Susanne, Dale, Phillip J., Sadewasser, Sascha, Colombara, Diego
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 05.05.2023; Wiley
• Subjects: alkali metal post-deposition treatment; Cathodoluminescence; Chalcopyrite; Copper indium selenides; Cu(In,Ga)Se 2; electrostatic potential fluctuations; Grain boundaries; MATERIALS SCIENCE; Oxidation; Photovoltaic cells; photovoltaics; Room temperature; Secondary ion mass spectrometry; Sodium; Solar cells; SOLAR ENERGY; Thin films

Alkali metal doping and grain boundaries (GB) have been at the center of attention within the Cu(In,Ga)(S,Se)2 photovoltaics community for years. This study provides the first experimental evidence that the GB of sodium‐doped CuInSe2 thin films may undertake reversible oxidation even at room tempera...