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Increased Open-Circuit Voltage of Organic Solar Cells by Reduced Donor-Acceptor Interface Area

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Abstract

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The charge carrier lifetime in small molecule: C60 photovoltaic devices is increased by reducing the physical interface area availabe for recombination. For donor contents below 10%, the gain in open-circuit voltage (Voc) depends logarithmically on the interface area while the energy of the interfacial charge-transfer state ECT remains invariant.

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