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dc.contributor.authorAyzner, Alexander L.
dc.contributor.authorMei, Jianguo
dc.contributor.authorAppleton, Anthony
dc.contributor.authorDeLongchamp, Dean
dc.contributor.authorNardes, Alexandre
dc.contributor.authorBenight, Stephanie
dc.contributor.authorKopidakis, Nikos
dc.contributor.authorToney, Michael F.
dc.contributor.authorBao, Zhenan
dc.date.accessioned2016-02-25T13:32:18Z
dc.date.available2016-02-25T13:32:18Z
dc.date.issued2015-08-21
dc.identifier.citationAyzner AL, Mei J, Appleton A, DeLongchamp D, Nardes A, et al. (2015) Impact of the Crystallite Orientation Distribution on Exciton Transport in Donor–Acceptor Conjugated Polymers. ACS Applied Materials & Interfaces 7: 28035–28041. Available: http://dx.doi.org/10.1021/acsami.5b02968.
dc.identifier.issn1944-8244
dc.identifier.issn1944-8252
dc.identifier.pmid26292836
dc.identifier.doi10.1021/acsami.5b02968
dc.identifier.urihttp://hdl.handle.net/10754/598568
dc.description.abstract© 2015 American Chemical Society. Conjugated polymers are widely used materials in organic photovoltaic devices. Owing to their extended electronic wave functions, they often form semicrystalline thin films. In this work, we aim to understand whether distribution of crystallographic orientations affects exciton diffusion using a low-band-gap polymer backbone motif that is representative of the donor/acceptor copolymer class. Using the fact that the polymer side chain can tune the dominant crystallographic orientation in the thin film, we have measured the quenching of polymer photoluminescence, and thus the extent of exciton dissociation, as a function of crystal orientation with respect to a quenching substrate. We find that the crystallite orientation distribution has little effect on the average exciton diffusion length. We suggest several possibilities for the lack of correlation between crystallographic texture and exciton transport in semicrystalline conjugated polymer films.
dc.description.sponsorshipWe thank the Bent group at Stanford University for help with ALD preparation of titania films. This work was partially supported by the Center for Advanced Molecular Photovoltaics, Award No. KUS-C1-015-21, made by King Abdullah University of Science and Technology. We also acknowledge support from the Global Climate and Energy Program at Stanford. GIXD measurements were carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. N.K. and A.M.N. acknowledge funding from the Energy Frontier Research Center “Molecularly Engineered Energy Materials (MEEMs)” funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract Number DE-SC0001342:001.
dc.publisherAmerican Chemical Society (ACS)
dc.subjectconjugated polymer
dc.subjectcrystallographic orientation
dc.subjectexciton diffusion
dc.subjectfluorescence quenching
dc.subjecttexture
dc.titleImpact of the Crystallite Orientation Distribution on Exciton Transport in Donor–Acceptor Conjugated Polymers
dc.typeArticle
dc.identifier.journalACS Applied Materials & Interfaces
dc.contributor.institutionStanford University, Palo Alto, United States
dc.contributor.institutionStanford Synchrotron Radiation Laboratory, Menlo Park, United States
dc.contributor.institutionNational Institute of Standards and Technology, Gaithersburg, United States
dc.contributor.institutionNational Renewable Energy Laboratory, Golden, United States
dc.contributor.institutionUniversity of California, Santa Cruz, Santa Cruz, United States
dc.contributor.institutionPurdue University College of Science, West Lafayette, United States
dc.contributor.institutionSt. Petersburg College, St Petersburg, United States
kaust.grant.numberKUS-C1-015-21
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)
dc.date.published-online2015-08-21
dc.date.published-print2015-12-30


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