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Πεδίο DCΤιμήΓλώσσα
dc.contributor.authorKan, Zhipeng-
dc.contributor.authorColella, Letizia-
dc.contributor.authorCanesi, Eleonora V.-
dc.contributor.authorLerario, Giovanni-
dc.contributor.authorKumar, R. Sai Santosh-
dc.contributor.authorBonometti, Valentina-
dc.contributor.authorMussini, Patrizia R.-
dc.contributor.authorCavallo, Gabriella-
dc.contributor.authorTerraneo, Giancarlo-
dc.contributor.authorPattanasattayavong, Pichaya-
dc.contributor.authorAnthopoulos, Thomas D.-
dc.contributor.authorBertarelli, Chiara-
dc.contributor.authorKeivanidis, Panagiotis E.-
dc.date.accessioned2020-04-29T19:21:41Z-
dc.date.available2020-04-29T19:21:41Z-
dc.date.issued2014-01-01-
dc.identifier.citationSolar Energy Materials and Solar Cells, 2014, vol. 120, iss. PART A, pp. 37-47en_US
dc.identifier.issn18790248-
dc.identifier.urihttps://hdl.handle.net/20.500.14279/18301-
dc.descriptionFunding text This work was partly supported by Fondazione Cariplo through the project INDIXI (Grant no. Ref.2011/0368 ). P.E.K. acknowledges the financial support of an Intra European Marie Curie Fellowship ( FP7-PEOPLE-2011-IEF project DELUMOPV) G.T. and G.C. acknowledge Fondazione Cariplo (projects 2009-2550 and 2010-1351 ) and project 5×1000 Junior 2011 for financial support. The authors would like to cordially thank Dr. M. R. Antognazza for offering access to her cw-PIA experimental set-up.en_US
dc.description.abstractHerein we present a methodology for improving the power conversion efficiency of organic solar cells made by photoactive layers of poly(3-hexylthiophene) (P3HT) and phenyl-C61 butyric acid methyl ester (PCBM) of non-optimized microstructure. In our study we achieve a 47% improvement in the power conversion efficiency (PCE) of the device by utilizing a thiophene-based quinoid (QBT) moiety as the third component in the P3HT:PCBM:QBT photoactive layers. Based on a set of independent characterization experiments we address the QBT composition dependent photophysical, electrical, thermal, structural and morphology-related properties of the ternary photovoltaic P3HT:PCBM:QBT system for elucidating the origin of the PCE improvement. In small amounts (0.3-0.6 wt%), QBT serves as a nucleation agent, it enlarges the size of the P3HT crystallites by 15% and it increases the fraction of well-ordered P3HT chains in the P3HT:PCBM:QBT layer. The improved microstructure of the photoactive layer in combination with the QBT-assisted photo-induced hole transfer step from PCBM to P3HT, lead to an increase of the charge photogeneration yield in the P3HT:PCBM:QBT triple bulk heterojunction. The relatively small optical gap of QBT facilitates a resonant energy transfer step from the photoexcited PCBM to the QBT followed by a charge transfer process between QBT and the P3HT matrix. Based on these findings we propose general guidelines for the design of next generation functional additives to be used in organic photovoltaics. © 2013 Elsevier B.V.en_US
dc.formatpdfen_US
dc.language.isoenen_US
dc.relation.ispartofSolar Energy Materials and Solar Cellsen_US
dc.rights© Elsevieren_US
dc.subjectAdditivesen_US
dc.subjectn-Type acceptorsen_US
dc.subjectOrganic photovoltaicsen_US
dc.subjectPhoton harvestingen_US
dc.subjectQuinoiden_US
dc.subjectTernary blenden_US
dc.titleTriple bulk heterojunctions as means for recovering the microstructure of photoactive layers in organic solar cell devicesen_US
dc.typeArticleen_US
dc.collaborationFondazione Istituto Italiano di Tecnologiaen_US
dc.collaborationPolitecnico di Milanoen_US
dc.collaborationUniversità degli Studi di Milanoen_US
dc.subject.categoryElectrical Engineering - Electronic Engineering - Information Engineeringen_US
dc.journalsSubscriptionen_US
dc.countryItalyen_US
dc.subject.fieldEngineering and Technologyen_US
dc.publicationPeer Revieweden_US
dc.identifier.doi10.1016/j.solmat.2013.08.007en_US
dc.identifier.scopus2-s2.0-84888325458-
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/84888325458-
dc.relation.issuePART Aen_US
dc.relation.volume120en_US
cut.common.academicyear2013-2014en_US
dc.identifier.spage37en_US
dc.identifier.epage47en_US
item.fulltextNo Fulltext-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.cerifentitytypePublications-
item.openairetypearticle-
crisitem.journal.journalissn0927-0248-
crisitem.journal.publisherElsevier-
crisitem.author.deptDepartment of Mechanical Engineering and Materials Science and Engineering-
crisitem.author.facultyFaculty of Engineering and Technology-
crisitem.author.orcid0000-0002-5336-249X-
crisitem.author.parentorgFaculty of Engineering and Technology-
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