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Theelen, M., Polman, K., Tomassini, M., Barreau, N., Steijvers, H., van Berkum, J., Vroon, Z. & Zeman, M. (2014) Influence of deposition pressure and selenisation on damp heat degradation of the Cu(In,Ga)Se-2 back contact molybdenum. Surf. Coat. Technol. 252 157–167. 
Added by: Laurent Cournède (2016-03-10 21:01:55)
Type de référence: Article
DOI: 10.1016/j.surfcoat.2014.05.001
Numéro d'identification (ISBN etc.): 0257-8972
Clé BibTeX: Theelen2014a
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Catégories: CESES
Mots-clés: Carbon, CIGS solar cells, damp heat, Degradation, film solar-cells, Molybdenum, Molybdenum oxide, Selenisation
Créateurs: Barreau, van Berkum, Polman, Steijvers, Theelen, Tomassini, Vroon, Zeman
Collection: Surf. Coat. Technol.
Consultations : 1/990
Indice de consultation : 7%
Indice de popularité : 1.75%
Résumé     
The impact of the molybdenum (Mo) microstructure and selenisation on degradation caused by 105 hour exposure to standard 'damp heat' has been investigated. Degradation effects were already observed without magnification after several hours of exposure. The degradation resulted in large volume expansion due to the formation of a thick non-conductive MoOx. layer consisting of various oxides and suboxides on top of the metallic molybdenum. This MoOx layer showed cracks and the appearance of needle-like structures. The degradation effect was the most severe for layers with the highest sputter pressure and thus the most porous microstructure. This can be attributed to higher mobility of the degrading species in the intergranular material (like MoOx) than in metallic Mo. The effect of selenisation was observed in the visual and optical characteristics the dense selenised molybdenum layer retained the highest reflectance. Likely, the presence of MoSe2 prevented rapid oxidation of the Mo. (C) 2014 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède  
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