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dc.contributor.authorHolliday, Sarah
dc.contributor.authorAshraf, Raja Shahid
dc.contributor.authorNielsen, Christian Bergenstof
dc.contributor.authorKirkus, Mindaugas
dc.contributor.authorRöhr, Jason A.
dc.contributor.authorTan, Chinghong
dc.contributor.authorCollado-Fregoso, Elisa
dc.contributor.authorKnall, Astrid Caroline
dc.contributor.authorDurrant, James R.
dc.contributor.authorNelson, Jenny K.
dc.contributor.authorMcCulloch, Iain
dc.date.accessioned2015-08-03T12:23:10Z
dc.date.available2015-08-03T12:23:10Z
dc.date.issued2015-01-12
dc.identifier.issn00027863
dc.identifier.doi10.1021/ja5110602
dc.identifier.urihttp://hdl.handle.net/10754/564016
dc.description.abstractA novel small molecule, FBR, bearing 3-ethylrhodanine flanking groups was synthesized as a nonfullerene electron acceptor for solution-processed bulk heterojunction organic photovoltaics (OPV). A straightforward synthesis route was employed, offering the potential for large scale preparation of this material. Inverted OPV devices employing poly(3-hexylthiophene) (P3HT) as the donor polymer and FBR as the acceptor gave power conversion efficiencies (PCE) up to 4.1%. Transient and steady state optical spectroscopies indicated efficient, ultrafast charge generation and efficient photocurrent generation from both donor and acceptor. Ultrafast transient absorption spectroscopy was used to investigate polaron generation efficiency as well as recombination dynamics. It was determined that the P3HT:FBR blend is highly intermixed, leading to increased charge generation relative to comparative devices with P3HT:PC60BM, but also faster recombination due to a nonideal morphology in which, in contrast to P3HT:PC60BM devices, the acceptor does not aggregate enough to create appropriate percolation pathways that prevent fast nongeminate recombination. Despite this nonoptimal morphology the P3HT:FBR devices exhibit better performance than P3HT:PC60BM devices, used as control, demonstrating that this acceptor shows great promise for further optimization.
dc.description.sponsorshipWe thank BASF for partial financial support, as well as EPSRC (EP/G037515/1) and EPSRC (EP/L016702/1), and EC FP7 Projects X10D (287818) and Nanomatcell (308997) for financial support. A.-C.K. acknowledges the Austrian Science Fund (FWF):[T 578-N19] for financial support.
dc.publisherAmerican Chemical Society (ACS)
dc.titleA rhodanine flanked nonfullerene acceptor for solution-processed organic photovoltaics
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of the American Chemical Society
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Centre for Plastic Electronics, Imperial College LondonLondon, United Kingdom
dc.contributor.institutionDepartment of Physics, Centre for Plastic Electronics, Imperial College LondonLondon, United Kingdom
dc.contributor.institutionSPECIFIC IKC, Swansea University, Baglan Bay Innovation CentrePort Talbot, Swansea, United Kingdom
kaust.personMcCulloch, Iain
dc.date.published-online2015-01-12
dc.date.published-print2015-01-21


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