Improved morphology of polymer-fullerene photovoltaic devices with thermally induced concentration gradients

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dc.contributorVirginia Tech. Physics Departmenten
dc.contributorVirginia Tech. Department of Chemical Engineeringen
dc.contributor.authorDrees, Martinen
dc.contributor.authorDavis, Richey M.en
dc.contributor.authorHeflin, James R.en
dc.contributor.departmentPhysicsen
dc.date.accessed2015-04-24en
dc.date.accessioned2015-05-21T15:46:26Zen
dc.date.available2015-05-21T15:46:26Zen
dc.date.issued2005-02-01en
dc.description.abstractGradient concentration profiles for efficient charge transfer and transport can be created in polymer-fullerene organic photovoltaics by thermally induced interdiffusion of an initial bilayer. Prior demonstrations with poly[2-methoxy-5-(2(')-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and C-60 have been limited by the low miscibility of the two component materials. The morphology of the interdiffused films and resultant photovoltaic efficiency are improved by the use of the more miscible electron donor/electron acceptor pair of poly(3-octylthiophene) and C-60. The resultant concentration gradient profile is demonstrated by Auger spectroscopy and ion-beam milling. Increases in the short-circuit currents and fill factors relative to interdiffused MEH-PPV/C-60 devices lead to monochromatic power conversion efficiencies of 1.5% at 470 nm. (C) 2005 American Institute of Physics.en
dc.format.extent4 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDrees, M., Davis, R. M., Heflin, J. R. (2005). Improved morphology of polymer-fullerene photovoltaic devices with thermally induced concentration gradients. Journal of Applied Physics, 97(3). doi: 10.1063/1.1845574en
dc.identifier.doihttps://doi.org/10.1063/1.1845574en
dc.identifier.issn0021-8979en
dc.identifier.urihttp://hdl.handle.net/10919/52390en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/97/3/10.1063/1.1845574en
dc.language.isoen_USen
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPolymersen
dc.subjectChemical interdiffusionen
dc.subjectActive layeren
dc.subjectSolar cellsen
dc.subjectAuger electron spectroscopyen
dc.titleImproved morphology of polymer-fullerene photovoltaic devices with thermally induced concentration gradientsen
dc.title.serialJournal of Applied Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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