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dc.contributor.authorSaladina, Maria
dc.contributor.authorSimón Marqués, Pablo
dc.contributor.authorMarkina, Anastasia
dc.contributor.authorKaruthedath, Safakath
dc.contributor.authorWöpke, Christopher
dc.contributor.authorGöhler, Clemens
dc.contributor.authorChen, Yue
dc.contributor.authorAllain, Magali
dc.contributor.authorBlanchard, Philippe
dc.contributor.authorCabanetos, Clément
dc.contributor.authorAndrienko, Denis
dc.contributor.authorLaquai, Frédéric
dc.contributor.authorGorenflot, Julien
dc.contributor.authorDeibel, Carsten
dc.date.accessioned2020-12-09T06:40:59Z
dc.date.available2020-12-09T06:40:59Z
dc.date.issued2020-12-03
dc.date.submitted2020-09-01
dc.identifier.citationSaladina, M., Simón Marqués, P., Markina, A., Karuthedath, S., Wöpke, C., Göhler, C., … Deibel, C. (2020). Charge Photogeneration in Non-Fullerene Organic Solar Cells: Influence of Excess Energy and Electrostatic Interactions. Advanced Functional Materials, 2007479. doi:10.1002/adfm.202007479
dc.identifier.issn1616-3028
dc.identifier.issn1616-301X
dc.identifier.doi10.1002/adfm.202007479
dc.identifier.urihttp://hdl.handle.net/10754/666309
dc.description.abstractIn organic solar cells, photogenerated singlet excitons form charge transfer (CT) complexes, which subsequently split into free charge carriers. Here, the contributions of excess energy and molecular quadrupole moments to the charge separation process are considered. The charge photogeneration in two separate bulk heterojunction systems consisting of the polymer donor PTB7-Th and two non-fullerene acceptors, ITIC and h-ITIC, is investigated. CT state dissociation in these donor–acceptor systems is monitored by charge density decay dynamics obtained from transient absorption experiments. The electric field dependence of charge carrier generation is studied at different excitation energies by time delayed collection field (TDCF) and sensitive steady-state photocurrent measurements. Upon excitation below the optical gap, free charge carrier generation becomes less field dependent with increasing photon energy, which challenges the view of charge photogeneration proceeding through energetically lowest CT states. The average distance between electron–hole pairs at the donor–acceptor interface is determined from empirical fits to the TDCF data. The delocalization of CT states is larger in PTB7-Th:ITIC, the system with larger molecular quadrupole moment, indicating the sizeable effect of the electrostatic potential at the donor–acceptor interface on the dissociation of CT complexes.
dc.description.sponsorshipThe work of M.S., P.S.M. and C.D. received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 722651 (SEPOMO). The work of C.W. and C.G. was funded by the DFG (project DE 830/19-1). The work of S.K., F.L. and J.G. was supported by funding from King Abdullah University of Science and Technology (KAUST). This publication is based on work supported by the KAUST Office of Sponsored Research (OSR) under award nos. OSR-2018-CARF/CCF-3079 and OSR-CRG2018-3746. D.A. acknowledges KAUST for funding his sabbatical stay. A.M. acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 844655 (SMOLAC). The authors thank the MATRIX SFR of the University of Angers.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/10.1002/adfm.202007479
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleCharge Photogeneration in Non-Fullerene Organic Solar Cells: Influence of Excess Energy and Electrostatic Interactions
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.identifier.journalAdvanced Functional Materials
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionInstitut für Physik, Technische Universität Chemnitz, 09126, Chemnitz, Germany
dc.contributor.institutionMOLTECH-Anjou CNRS UMR 6200, University of Angers, 49045, Angers, France
dc.contributor.institutionMax Planck Institute for Polymer Research, 55128, Mainz, Germany
dc.identifier.pages2007479
kaust.personKaruthedath, Safakath
kaust.personLaquai, Frederic
kaust.personGorenflot, Julien
kaust.grant.numberCRG
kaust.grant.numberOSR-2018-CARF/CCF-3079
dc.date.accepted2020-10-31
dc.relation.issupplementedbyDOI:10.5517/ccdc.csd.cc25tvkf
dc.identifier.eid2-s2.0-85097027273
refterms.dateFOA2020-12-09T06:42:23Z
display.relations<b>Is Supplemented By:</b><br/> <ul><li><i>[Dataset]</i> <br/> Saladina, Maria, Marqués, Pablo Simón, Markina, Anastasia, Karuthedath, Safakath, Wöpke, Christopher, Göhler, Clemens, Chen, Yue, Allain, Magali, Blanchard, Philippe, Cabanetos, Clément, Andrienko, Denis, Laquai, Frédéric, Gorenflot, Julien, &amp; Deibel, Carsten. (2021). <i>CCDC 2020845: Experimental Crystal Structure Determination</i> [Data set]. Cambridge Crystallographic Data Centre. https://doi.org/10.5517/CCDC.CSD.CC25TVKF. DOI: <a href="https://doi.org/10.5517/ccdc.csd.cc25tvkf" >10.5517/ccdc.csd.cc25tvkf</a> Handle: <a href="http://hdl.handle.net/10754/668132" >10754/668132</a></a></li></ul>
kaust.acknowledged.supportUnitCCF
kaust.acknowledged.supportUnitKAUST Office of Sponsored Research (OSR)
dc.date.published-online2020-12-03
dc.date.published-print2021-02


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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.