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dc.contributor.authorSajjad, Muhammad T.
dc.contributor.authorBlaszczyk, Oskar
dc.contributor.authorKrishnan Jagadamma, Lethy
dc.contributor.authorRoland, Thomas
dc.contributor.authorChowdhury, Mithun
dc.contributor.authorRuseckas, Arvydas
dc.contributor.authorSamuel, Ifor D. W.
dc.date.accessioned2019-04-18T23:38:09Z
dc.date.available2019-04-18T23:38:09Z
dc.date.issued2018-05-28
dc.identifier252870946
dc.identifier41dd7b2c-4096-407b-ad76-0149b3e33069
dc.identifier85047554939
dc.identifier000433427300014
dc.identifier.citationSajjad , M T , Blaszczyk , O , Krishnan Jagadamma , L , Roland , T , Chowdhury , M , Ruseckas , A & Samuel , I D W 2018 , ' Engineered exciton diffusion length enhances device efficiency in small molecule photovoltaics ' , Journal of Materials Chemistry A , vol. 6 , no. 20 , pp. 9445-9450 . https://doi.org/10.1039/C8TA01226Aen
dc.identifier.issn2050-7488
dc.identifier.otherORCID: /0000-0001-9114-3522/work/44130495
dc.identifier.otherORCID: /0000-0002-4339-2484/work/60196634
dc.identifier.urihttps://hdl.handle.net/10023/17546
dc.descriptionFunding: European Research Council (grant 321305). IDWS acknowledges a Royal Society Wolfson Research Merit Award. We are grateful to EPSRC for equipment grant (EP/L017008/1) and for support of OB (EP/M508214/1).en
dc.description.abstractIn organic photovoltaic blends, there is a trade-off between exciton harvesting and charge extraction because of the short exciton diffusion length. Developing a way of increasing exciton diffusion length would overcome this trade-off by enabling efficient light harvesting from large domains. In this work, we engineered (enhanced) both exciton diffusion length and domain size using solvent vapour annealing (SVA). We show that SVA can give a three-fold enhancement in exciton diffusion coefficient (D) and nearly a doubling of exciton diffusion length. It also increases the domain size, leading to enhancement of charge extraction efficiency from 63 to 89%. Usually larger domains would reduce exciton harvesting but this is overcome by the large increase in exciton diffusion, leading to a 20% enhancement in device efficiency.
dc.format.extent6
dc.format.extent817643
dc.language.isoeng
dc.relation.ispartofJournal of Materials Chemistry Aen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectDASen
dc.subjectSDG 7 - Affordable and Clean Energyen
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleEngineered exciton diffusion length enhances device efficiency in small molecule photovoltaicsen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Research Councilen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doi10.1039/C8TA01226A
dc.description.statusPeer revieweden
dc.date.embargoedUntil2019-04-19
dc.identifier.grantnumberen
dc.identifier.grantnumberep/l017008/1en
dc.identifier.grantnumberen


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