Publications associated with Advanced Functional Materials and Devices Group

Increased open-circuit voltage of organic solar cells by reduced donor-acceptor interface area

Advanced Materials 26 (2014) 3839-3843

K Vandewal, J Widmer, T Heumueller, CJ Brabec, MD McGehee, K Leo, M Riede, A Salleo

The charge carrier lifetime in small molecule: C 60 photovoltaic devices is increased by reducing the physical interface area availabe for recombination. For donor contents below 10%, the gain in open-circuit voltage (V oc ) depends logarithmically on the interface area while the energy of the interfacial charge-transfer state E CT remains invariant. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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