Field Effect versus Driving Force: Charge Generation in Small-Molecule Organic Solar Cells

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dc.authoridKublitski, Jonas/0000-0003-0558-9152
dc.authoridSpoltore, Donato/0000-0002-2922-9293
dc.authoridInce, Mine/0000-0002-9164-0446
dc.authoridYUZER, ABDULCELIL/0000-0002-2287-4126
dc.authoridVandewal, Koen/0000-0001-5471-383X
dc.authoridDurrant, James/0000-0001-8353-7345
dc.authoridBenduhn, Johannes/0000-0001-5683-9495
dc.contributor.authorNikolis, Vasileios C.
dc.contributor.authorDong, Yifan
dc.contributor.authorKublitski, Jonas
dc.contributor.authorBenduhn, Johannes
dc.contributor.authorZheng, Xijia
dc.contributor.authorHuang, Chengye
dc.contributor.authorYuzer, A. Celil
dc.date.accessioned2025-03-17T12:27:46Z
dc.date.available2025-03-17T12:27:46Z
dc.date.issued2020
dc.departmentTarsus Üniversitesi
dc.description.abstractEfficient charge generation in organic semiconductors usually requires an interface with an energetic gradient between an electron donor and an electron acceptor in order to dissociate the photogenerated excitons. However, single-component organic solar cells based on chloroboron subnaphthalocyanine (SubNc) have been reported to provide considerable photocurrents despite the absence of an energy gradient at the interface with an acceptor. In this work, it is shown that this is not due to direct free carrier generation upon illumination of SubNc, but due to a field-assisted exciton dissociation mechanism specific to the device configuration. Subsequently, the implications of this effect in bilayer organic solar cells with SubNc as the donor are demonstrated, showing that the external and internal quantum efficiencies in such cells are independent of the donor-acceptor interface energetics. This previously unexplored mechanism results in efficient photocurrent generation even though the driving force is minimized and the open-circuit voltage is maximized.
dc.description.sponsorshipGerman Federal Ministry of Education and Research (BMBF) [FKZ 03IPT602X]; Projekt DEAL
dc.description.sponsorshipV.C.N. and Y.D. contributed equally to this work. The authors would like to thank Prof. Dr. Dieter Neher for providing measurement time on the electroluminescence setup of his lab at University of Potsdam. They would also like to acknowledge the Optoelectronics group in the University of Cambridge for sharing the global analysis codes. This work was supported by the German Federal Ministry of Education and Research (BMBF) through the InnoProfile project Organische p-i-n Bauelemente2.2 (FKZ 03IPT602X). A.A.B. is a Royal Society university research fellow. Open access funding enabled and organized by Projekt DEAL.
dc.identifier.doi10.1002/aenm.202002124
dc.identifier.issn1614-6832
dc.identifier.issn1614-6840
dc.identifier.scopus2-s2.0-85096706626
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1002/aenm.202002124
dc.identifier.urihttps://hdl.handle.net/20.500.13099/2426
dc.identifier.wosWOS:000587432800001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofAdvanced Energy Materials
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WOS_20250316
dc.subjectcharge generation
dc.subjectdriving force
dc.subjectfield‐ dependent
dc.subjectorganic solar cells
dc.subjectultrafast spectroscopy
dc.titleField Effect versus Driving Force: Charge Generation in Small-Molecule Organic Solar Cells
dc.typeArticle

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