Evidence of Reversible Oxidation at CuInSe2 Grain Boundaries
[5];
- International Iberian Nanotechnology Laboratory; Universita degli Studi di Genova
- Luxembourg Institute of Science and Technology
- University of Versailles
- University of Luxembourg
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- International Iberian Nanotechnology Laboratory
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.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1603911
- Report Number(s):
- NREL/CP-5K00-76283
- Resource Relation:
- Conference: Presented at the 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), 16-21 June 2019, Chicago, Illinois
- Country of Publication:
- United States
- Language:
- English
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