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Creation of a gradient polymer-fullerene interface in photovoltaic devices by thermally controlled interdiffusion

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dc.contributorVirginia Techen
dc.contributor.authorDrees, M.en
dc.contributor.authorPremaratne, K.en
dc.contributor.authorGraupner, W.en
dc.contributor.authorHeflin, James R.en
dc.contributor.authorDavis, Ruth M.en
dc.contributor.authorMarciu, D.en
dc.contributor.authorMiller, M.en
dc.contributor.departmentChemical Engineeringen
dc.contributor.departmentPhysicsen
dc.date.accessed2014-03-27en
dc.date.accessioned2014-04-16T14:16:40Zen
dc.date.available2014-04-16T14:16:40Zen
dc.date.issued2002-12-01en
dc.description.abstractEfficient polymer-fullerene photovoltaic devices require close proximity of the two materials to ensure photoexcited electron transfer from the semiconducting polymer to the fullerene acceptor. We describe studies in which a bilayer system consisting of spin-cast 2-methoxy-5-(2(')-ethylhexyloxy)-1,4-phenylenevinylene copolymer (MEH-PPV) and sublimed C-60 is heated above the MEH-PPV glass transition temperature in an inert environment, inducing an interdiffusion of the polymer and the fullerene layers. With this process, a controlled, bulk, gradient heterojunction is created bringing the fullerene molecules within the exciton diffusion radius of the MEH-PPV throughout the film to achieve highly efficient charge separation. The interdiffused devices show a dramatic decrease in photoluminescence and concomitant increase in short circuit currents, demonstrating the improved interface. (C) 2002 American Institute of Physics.en
dc.description.sponsorshipNSF STTR program through Grant No. DMI-0060515en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationDrees, M; Premaratne, K; Graupner, W; et al., "Creation of a gradient polymer-fullerene interface in photovoltaic devices by thermally controlled interdiffusion," Appl. Phys. Lett. 81, 4607 (2002); http://dx.doi.org/10.1063/1.1522830en
dc.identifier.doihttps://doi.org/10.1063/1.1522830en
dc.identifier.issn0003-6951en
dc.identifier.urihttp://hdl.handle.net/10919/47371en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/apl/81/24/10.1063/1.1522830en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPhotoinduced electron-transferen
dc.subjectConducting-polymeren
dc.subjectBlendsen
dc.subjectCellsen
dc.titleCreation of a gradient polymer-fullerene interface in photovoltaic devices by thermally controlled interdiffusionen
dc.title.serialApplied Physics Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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