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2.5% Efficient Organic Plastic Solar Cells

S. Shaheen, C. Brabec, N. S. Sariciftci, F. Padinger, T. Fromherz, J. C. Hummelen
Published 2001 · Materials Science

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We show that the power conversion efficiency of organic photovoltaic devices based on a conjugated polymer/methanofullerene blend is dramatically affected by molecular morphology. By structuring the blend to be a more intimate mixture that contains less phase segregation of methanofullerenes, and simultaneously increasing the degree of interactions between conjugated polymer chains, we have fabricated a device with a power conversion efficiency of 2.5% under AM1.5 illumination. This is a nearly threefold enhancement over previously reported values for such a device, and it approaches what is needed for the practical use of these devices for harvesting energy from sunlight.
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