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dc.contributor.authorLabrunie, Antoine
dc.contributor.authorGorenflot, Julien
dc.contributor.authorBabics, Maxime
dc.contributor.authorAleveque, Olivier
dc.contributor.authorDabos-Seignon, Sylvie
dc.contributor.authorBalawi, Ahmed H.
dc.contributor.authorKan, Zhipeng
dc.contributor.authorWohlfahrt, Markus
dc.contributor.authorLevillain, Eric
dc.contributor.authorHudhomme, Pietrick
dc.contributor.authorBeaujuge, Pierre
dc.contributor.authorLaquai, Frédéric
dc.contributor.authorCabanetos, Clément
dc.contributor.authorBlanchard, Philippe
dc.date.accessioned2018-04-30T06:58:22Z
dc.date.available2018-04-30T06:58:22Z
dc.date.issued2018-04-23
dc.identifier.citationLabrunie A, Gorenflot J, Babics M, Aleveque O, Dabos-Seignon S, et al. (2018) A triphenylamine-based push-pull – σ – C60 dyad as photoactive molecular material for single-component organic solar cells: synthesis, characterizations and photophysical properties. Chemistry of Materials. Available: http://dx.doi.org/10.1021/acs.chemmater.8b01117.
dc.identifier.issn0897-4756
dc.identifier.issn1520-5002
dc.identifier.doi10.1021/acs.chemmater.8b01117
dc.identifier.urihttp://hdl.handle.net/10754/627685
dc.description.abstractA push-pull – σ – C60 molecular dyad was synthesized via Huisgen-type click-chemistry and used as photoactive material for single-component organic solar cells. Steady-state photoluminescence (PL) experiments of the dyad in solution show a significant quenching of the emission of the push-pull moiety. Spin-casting of a solution of the dyad results in homogenous and smooth thin-films, which exhibit complete PL quenching in line with ultrafast photo-induced electron-transfer in the solid-state. Spectro-electrochemistry reveals the optical signatures of radical cations and radical anions. Evaluation of the charge carrier mobility by space-charge limited current measurements gives an electron-mobility of μe = 4.3 × 10-4 cm2 V-1 s-1, ca. 50 times higher than the hole-mobility. Single-component organic solar cells yield an open-circuit voltage Voc of 0.73 V and a short-circuit current density of 2.1 mA cm-2 however, a poor fill-factor FF (29%) is obtained, resulting in low power conversion efficiency of only 0.4%. Combined TA and time-delayed collection field (TDCF) experiments show mostly ultrafast photon-to-charge conversion and a small component of diffusion-limited exciton dissociation, revealing the presence of pure fullerene domains. Furthermore, a strong field dependence of charge generation is observed, governing the device fill factor, which is further reduced by a competition between extraction and fast recombination of separated charges.
dc.description.sponsorshipThe RFI LUMOMAT from the Région Pays de la Loire is acknowledged for the PhD grant of A. Labrunie. We thank also the PIAM (Plateforme d’Ingénierie et Analyses Moléculaires) of the University of Angers for the characterization of organic compounds and R. Mallet, from the SCIAM of the University of Angers for TEM experiments. Jonhson Mattey is acknowledged for the gift of PdCl2 used for the preparation of Pd(PPh3)4 catalyst. The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). M. Wohlfahrt acknowledges a VSRP internship from KAUST.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.chemmater.8b01117
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 https://pubs.acs.org/doi/10.1021/acs.chemmater.8b01117.
dc.titleA triphenylamine-based push-pull – σ – C60 dyad as photoactive molecular material for single-component organic solar cells: synthesis, characterizations and photophysical properties
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentMaterials Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.identifier.journalChemistry of Materials
dc.eprint.versionPost-print
dc.contributor.institutionMOLTECH-Anjou, CNRS UMR 6200, University of Angers, 2 Bd Lavoisier, 49045 Angers, France
kaust.personGorenflot, Julien
kaust.personBabics, Maxime
kaust.personBalawi, Ahmed H.
kaust.personKan, Zhipeng
kaust.personWohlfahrt, Markus
kaust.personBeaujuge, Pierre
kaust.personLaquai, Frédéric


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