Show simple item record

dc.contributor.authorTamai, Yasunari
dc.contributor.authorFan, Yeli
dc.contributor.authorKim, Vincent O.
dc.contributor.authorZiabrev, Kostiantyn
dc.contributor.authorRao, Akshay
dc.contributor.authorBarlow, Stephen
dc.contributor.authorMarder, Seth R.
dc.contributor.authorFriend, Richard H.
dc.contributor.authorMenke, S. Matthew
dc.date.accessioned2021-04-12T06:43:16Z
dc.date.available2021-04-12T06:43:16Z
dc.date.issued2017-11-17
dc.identifier.citationTamai, Y., Fan, Y., Kim, V. O., Ziabrev, K., Rao, A., Barlow, S., … Menke, S. M. (2017). Ultrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells. ACS Nano, 11(12), 12473–12481. doi:10.1021/acsnano.7b06575
dc.identifier.issn1936-0851
dc.identifier.issn1936-086X
dc.identifier.doi10.1021/acsnano.7b06575
dc.identifier.urihttp://hdl.handle.net/10754/668672
dc.description.abstractRapid, long-range charge separation in polymer-fullerene organic solar cells (OSCs) enables electrons and holes to move beyond their Coulomb capture radius and overcome geminate recombination. Understanding the nature of charge generation and recombination mechanisms in efficient, nonfullerene-acceptor-based OSCs are critical to further improve device performance. Here we report charge dynamics in an OSC using a perylene diimide (PDI) dimer acceptor. We use transient absorption spectroscopy to track the time evolution of electroabsorption caused by the dipolar electric field generated between electron-hole pairs as they separate after ionization at the donor-acceptor interface. We show that charges separate rapidly (<1 ps) and that free charge carriers are generated very efficiently (∼90% quantum yield). However, in the PDI-based OSC, external charge extraction is impaired by faster nongeminate decay to the ground state and to lower-lying triplet states.
dc.description.sponsorshipThe authors thank the Engineering and Physical Sciences Research Council (EPSRC) and the Winton Programme for the Physics of Sustainability. Y.T. was supported by JSPS Postdoctoral Fellowships for Research Abroad. Work at Georgia Tech was supported by the Department of the Navy, Office of Naval Research award no. N00014-14-1-0580 (CAOP MURI) and through a State-Sponsored Scholarship for Graduate Students to Y.F. from the China Scholarship Council. S.M.M. and R.H.F acknowledge support from the KAUST Competitive Research Grant Program.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsnano.7b06575
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, 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/acsnano.7b06575.
dc.titleUltrafast Long-Range Charge Separation in Nonfullerene Organic Solar Cells
dc.typeArticle
dc.identifier.journalACS Nano
dc.eprint.versionPost-print
dc.contributor.institutionCavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom
dc.contributor.institutionCenter for Organic Photonics and Electronics and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
dc.identifier.volume11
dc.identifier.issue12
dc.identifier.pages12473-12481
dc.identifier.eid2-s2.0-85040072568
kaust.acknowledged.supportUnitCompetitive Research Grant
kaust.acknowledged.supportUnitOffice of Naval Research


This item appears in the following Collection(s)

Show simple item record