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C. G. Zimmermann, C. Nömayr, M. Kolb and A. Rucki A mechanism of solar cell degradation in high intensity, high temperature space missions Progress in Photovoltaics: Research and Applications 21

Article first published online: 24 NOV 2011 | DOI: 10.1002/pip.1195

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A new degradation mechanism of photovoltaic assemblies, active in high intensity, high temperature space environments, was observed. Organic acids can form on external reaction surfaces such as Ag busbars, through the interaction of polysiloxanes with ultraviolet light and transport metallic impurities such as Cu to the cell. For this failure mechanism to be prevented, which resulted in up to 20% performance degradation because of the formation of Cu3P inclusions, an adapted solar cell design is suggested.

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