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AFM images of pm-Si :H and a-Si :H solar cells on Corning Eagle glass before (a, c) and after (b, d) light-soaking, and (e) mean surface grain area evolution during light-soaking, as extracted from AFM images. Note that no evolution is observed for the a-Si :H film, and that the evolution for the pm-Si :H cell stops when the light source is off.
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