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dc.contributor.authorWang, Kai
dc.contributor.authorFirdaus, Yuliar
dc.contributor.authorBabics, Maxime
dc.contributor.authorCruciani, Federico
dc.contributor.authorSaleem, Qasim
dc.contributor.authorEl Labban, Abdulrahman
dc.contributor.authorAlamoudi, Maha A
dc.contributor.authorMarszalek, Tomasz
dc.contributor.authorPisula, Wojciech
dc.contributor.authorLaquai, Frédéric
dc.contributor.authorBeaujuge, Pierre
dc.date.accessioned2016-03-03T12:20:16Z
dc.date.available2016-03-03T12:20:16Z
dc.date.issued2016-03-28
dc.identifier.citationπ-Bridge-Independent 2-(Benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile-Substituted Nonfullerene Acceptors for Efficient Solar Cells 2016 Chemistry of Materials
dc.identifier.issn0897-4756
dc.identifier.issn1520-5002
dc.identifier.doi10.1021/acs.chemmater.6b00131
dc.identifier.urihttp://hdl.handle.net/10754/600521
dc.description.abstractMolecular acceptors are promising alternatives to fullerenes (e.g. PC61/71BM) in the fabrication of high-efficiency bulk-heterojunction (BHJ) solar cells. While solution-processed polymer-fullerene BHJ devices have recently met the 10% efficiency threshold, molecular acceptors have yet to prove comparably efficient with polymer donors. At this point in time, it is important to forge a better understanding of the design parameters that directly impact small-molecule (SM) acceptor performance in BHJ solar cells. In this report, we show that 2-(benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile (BM)-terminated SM acceptors can achieve efficiencies as high as 5.3% in BHJ solar cells with the polymer donor PCE10. Through systematic device optimization and characterization studies, we find that the nonfull-erene analogues (FBM, CBM and CDTBM) all perform comparably well, independent of the molecular structure and electronics of the π-bridge that links the two electron-deficient BM end groups. With estimated electron affinities within range of those of common fullerenes (4.0-4.3 eV), and a wider range of ionization potentials (6.2-5.6 eV), the SM acceptors absorb in the visible spectrum and effectively contribute to the BHJ device photocurrent. BM-substituted SM acceptors are promising alterna-tives to fullerenes in solution-processed BHJ solar cells.
dc.description.sponsorshipThis publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No.CRG_R2_13_BEAU_KAUST_1. The authors acknowledge concurrent support under Baseline Research Funding from KAUST. The authors thank KAUST ACL for technical support in the mass spectrometry analyses. W.P. and T.M. gratefully acknowledge the staff of beamline 9 at the DELTA electron storage ring in Dortmund for providing beamtime and technical support for the GIWAXS measurements. W.P. and T.M. thank Marcelina Rojek for technical support in the GIWAXS measurements.
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b00131
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.6b00131.
dc.titleπ-Bridge-Independent 2-(Benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile-Substituted Nonfullerene Acceptors for Efficient Solar Cells
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.identifier.journalChemistry of Materials
dc.eprint.versionPost-print
dc.contributor.institutionMax Planck Institute for Polymer Research, Anckermannweg 10, D-­55128 Mainz, Germany
dc.contributor.institutionDepartment of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-­924 Lodz, Poland
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personWang, Kai
kaust.personFirdaus, Yuliar
kaust.personBabics, Maxime
kaust.personCruciani, Federico
kaust.personSaleem, Qasim
kaust.personEl Labban, Abdulrahman
kaust.personAlamoudi, Maha
kaust.personLaquai, Frederic
kaust.personBeaujuge, Pierre
kaust.grant.numberCRG_R2_13_BEAU_KAUST_1
refterms.dateFOA2017-02-25T00:00:00Z
kaust.acknowledged.supportUnitBaseline Research Funding
kaust.acknowledged.supportUnitAnalytical Chemistry Core Laboratory
kaust.acknowledged.supportUnitOffice of Sponsored Research
dc.date.published-online2016-03-28
dc.date.published-print2016-04-12


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