Print Email Facebook Twitter The influence of atmospheric species on the degradation of the Mo/MoSe2 back contact in CIGS solar cells Title The influence of atmospheric species on the degradation of the Mo/MoSe2 back contact in CIGS solar cells Author Theelen, M. Broos, R.J.P. Hovestad, A. Publication year 2022 Abstract The degradation mechanisms of the molybdenum (Mo) back contact for Cu(In,Ga)Se2 solar cells in the presence of atmospheric species have been investigated. Mo/MoSe2 films on glass were immersed in water purged with the gases oxygen (O2), nitrogen (N2), carbon dioxide (CO2), air, in non-purged water, and exposed to air. It was found that the degradation rate is the highest in the combined presence of liquid water and oxygen. Degradation in water was less in the absence of oxygen, while air exposure displayed the least degradation. The main degradation product was MoO2, which was found at places where metallic molybdenum was not fully covered by MoSe2. MoSe2 is thus a good protective measure against molybdenum oxidation and can play an important role to protect CIGS devices against environmental degradation. Subject CIGS solar CellsCorrosionDegradationMolybdenumMolybdenum selenideSelenisation To reference this document use: http://resolver.tudelft.nl/uuid:46622cec-ccc3-453b-b214-6754accd1c85 DOI https://doi.org/10.1016/j.matchemphys.2021.125686 TNO identifier 962958 Publisher Elsevier Ltd ISSN 0254-0584 Source Materials Chemistry and Physics, 279 (279) Document type article Files To receive the publication files, please send an e-mail request to TNO Library.