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

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

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 interfac...

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Veröffentlicht in:Advanced materials (Weinheim) 2014-06, Vol.26 (23), p.3839-3843
Hauptverfasser: Vandewal, Koen, Widmer, Johannes, Heumueller, Thomas, Brabec, Christoph J., McGehee, Michael D., Leo, Karl, Riede, Moritz, Salleo, Alberto
Format: Artikel
Sprache:eng
Schlagworte:
Buckminsterfullerene
bulk heterojunction
charge-transfer state
Electric potential
Fullerenes
Gain
Invariants
open-circuit voltage
organic solar cells
Photovoltaic cells
Solar cells
Voltage
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Zusammenfassung: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.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201400114