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

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.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.isoen_USen
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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