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dc.contributor.authorLong, Yun
dc.contributor.authorHedley, Gordon James
dc.contributor.authorRuseckas, Arvydas
dc.contributor.authorChowdhury, Mithun
dc.contributor.authorRoland, Thomas Jean
dc.contributor.authorSerrano, Luis
dc.contributor.authorCooke, Graeme
dc.contributor.authorSamuel, Ifor David William
dc.identifier.citationLong , Y , Hedley , G J , Ruseckas , A , Chowdhury , M , Roland , T J , Serrano , L , Cooke , G & Samuel , I D W 2017 , ' Effect of annealing on exciton diffusion in a high performance small molecule organic photovoltaic material ' , ACS Applied Materials & Interfaces , vol. 9 , no. 17 , pp. 14945-14952 .
dc.identifier.otherPURE: 249500649
dc.identifier.otherPURE UUID: b1cd8f84-cf15-401e-9da6-5f459bab5fea
dc.identifier.otherScopus: 85018994107
dc.identifier.otherORCID: /0000-0001-9114-3522/work/32543053
dc.identifier.otherWOS: 000400802700042
dc.description.abstractSinglet exciton diffusion was studied in the efficient organic photovoltaic electron donor material DTS(FBTTh2)2. Three complementary time-resolved fluorescence measurements were performed: quenching in planar heterojunctions with an electron acceptor; exciton-exciton annihilation; and fluorescence depolarization. The average exciton diffusivity increases upon annealing from 1.6 × 10-3 cm2 s-1 to 3.6 × 10-3 cm2 s-1, resulting in an enhancement of the mean two–dimensional exciton diffusion length (LD=√4Dτ) from 15 nm to 27 nm. About 30% of the excitons get trapped very quickly in as-cast films. The high exciton diffusion coefficient of the material leads to it being able to harvest excitons efficiently from large donor domains in bulk heterojunctions.
dc.relation.ispartofACS Applied Materials & Interfacesen
dc.rights© 2017 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.en
dc.subjectOrganic solar cellsen
dc.subjectOrganic semiconductorsen
dc.subjectLight harvestingen
dc.subjectExcitation energy transferen
dc.subjectBulk heterojunctionsen
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectSDG 7 - Affordable and Clean Energyen
dc.titleEffect of annealing on exciton diffusion in a high performance small molecule organic photovoltaic materialen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Research Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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