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dc.contributor.authorBaran, Derya
dc.contributor.authorGasparini, Nicola
dc.contributor.authorWadsworth, Andrew
dc.contributor.authorTan, Ching Hong
dc.contributor.authorWehbe, Nimer
dc.contributor.authorSong, Xin
dc.contributor.authorHamid, Zeinab
dc.contributor.authorZhang, Weimin
dc.contributor.authorNeophytou, Marios
dc.contributor.authorKirchartz, Thomas
dc.contributor.authorBrabec, Christoph J.
dc.contributor.authorDurrant, James R.
dc.contributor.authorMcCulloch, Iain
dc.date.accessioned2018-05-29T11:09:57Z
dc.date.available2018-05-29T11:09:57Z
dc.date.issued2018-05-25
dc.identifier.citationBaran D, Gasparini N, Wadsworth A, Tan CH, Wehbe N, et al. (2018) Robust nonfullerene solar cells approaching unity external quantum efficiency enabled by suppression of geminate recombination. Nature Communications 9. Available: http://dx.doi.org/10.1038/s41467-018-04502-3.
dc.identifier.issn2041-1723
dc.identifier.doi10.1038/s41467-018-04502-3
dc.identifier.urihttp://hdl.handle.net/10754/627982
dc.description.abstractNonfullerene solar cells have increased their efficiencies up to 13%, yet quantum efficiencies are still limited to 80%. Here we report efficient nonfullerene solar cells with quantum efficiencies approaching unity. This is achieved with overlapping absorption bands of donor and acceptor that increases the photon absorption strength in the range from about 570 to 700 nm, thus, almost all incident photons are absorbed in the active layer. The charges generated are found to dissociate with negligible geminate recombination losses resulting in a short-circuit current density of 20 mA cm-2 along with open-circuit voltages >1 V, which is remarkable for a 1.6 eV bandgap system. Most importantly, the unique nano-morphology of the donor:acceptor blend results in a substantially improved stability under illumination. Understanding the efficient charge separation in nonfullerene acceptors can pave the way to robust and recombination-free organic solar cells.
dc.description.sponsorshipD.B. thanks the Helmholtz Association and Julich Forschungszentrum for financial support via Helmholtz Postdoctoral Fellowship. T.K. acknowledges continuous support from Uwe Rau. A.W. and I.M. thanks EC FP7 Project SC2 (610115), EC FP7 Project ArtESun (604397), and EPSRC Projects EP/G037515/1, EP/M005143/1, T.K. acknowledges support from the DFG (grant KI-1571/2-1).
dc.publisherSpringer Nature
dc.relation.urlhttps://www.nature.com/articles/s41467-018-04502-3
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1038/s41467-018-04502-3
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleRobust nonfullerene solar cells approaching unity external quantum efficiency enabled by suppression of geminate recombination
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSurface Science
dc.identifier.journalNature Communications
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionInstitute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, UK
dc.contributor.institutionFaculty of Engineering and CENIDE, University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany
dc.contributor.institutionIEK5-Photovoltaics, Forschungszentrum Jülich, 52425 Jülich, Germany
dc.contributor.institutionZAE Bayern, Immerwahrstraße 2, Erlangen 91058, Germany
dc.contributor.institutionSPECIFIC IKC, Swansea University, Baglan Bay Innovation Centre, Port Talbot, Swansea SA12 7AX, UK
kaust.personBaran, Derya
kaust.personGasparini, Nicola
kaust.personWehbe, Nimer
kaust.personSong, Xin
kaust.personZhang, Weimin
kaust.personNeophytou, Marios
kaust.personMcCulloch, Iain
refterms.dateFOA2018-06-14T06:41:27Z
dc.date.published-online2018-05-25
dc.date.published-print2018-12


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The final publication is available at Springer via http://dx.doi.org/10.1038/s41467-018-04502-3
Except where otherwise noted, this item's license is described as The final publication is available at Springer via http://dx.doi.org/10.1038/s41467-018-04502-3