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Dennis J. Coyle Life prediction for CIGS solar modules part 1: modeling moisture ingress and degradation Progress in Photovoltaics: Research and Applications 21

Article first published online: 10 OCT 2011 | DOI: 10.1002/pip.1172

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Coupled moisture ingress calculations and degradation kinetics for CIGS solar cells predict module life for various cells, packages, and climates. Moisture ingress and degradation scale with the climate and the package diffusion half-time. Moisture-sensitive cells require barriers of 10−4 g/m2 day or better. For diffusion-controlled packages, life depends on the square root of package permeability and cell degradation rate. Acceleration factors for damp heat versus Miami are nonlinear and range from 10X to 700X, depending on the package and cell degradation kinetics.

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