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dc.contributor.authorKhan, Jafar Iqbal
dc.contributor.authorAshraf, Raja
dc.contributor.authorAlamoudi, Maha A
dc.contributor.authorNabi, Mohammed N.
dc.contributor.authorMohammed, Hamza N.
dc.contributor.authorWadsworth, Andrew
dc.contributor.authorFirdaus, Yuliar
dc.contributor.authorZhang, Weimin
dc.contributor.authorAnthopoulos, Thomas D.
dc.contributor.authorMcCulloch, Iain
dc.contributor.authorLaquai, Frédéric
dc.date.accessioned2019-05-14T12:52:26Z
dc.date.available2019-05-14T12:52:26Z
dc.date.issued2019-05-17
dc.identifier.citationKhan JI, Ashraf RS, Alamoudi MA, Nabi MN, Mohammed HN, et al. (2019) P3HT Molecular Weight Determines the Performance of P3HT:O-IDTBR Solar Cells. Solar RRL. Available: http://dx.doi.org/10.1002/solr.201900023.
dc.identifier.issn2367-198X
dc.identifier.issn2367-198X
dc.identifier.doi10.1002/solr.201900023
dc.identifier.urihttp://hdl.handle.net/10754/652875
dc.description.abstractLarge-scale production of organic solar modules requires low-cost and reliable materials with reproducible batch-to-batch properties. In case of polymers, their (photo)physical properties depend strongly on the polymers’ molecular weight. Here, we study the impact of the molecular weight of the donor polymer poly(3-hexylthiophene) (P3HT) on the photophysics in blends with a recently-developed rhodanine-endcapped indacenodithiophene non-fullerene acceptor (IDTBR), a bulk heterojunction system that can potentially fulfill the aforementioned criteria for large-scale production. We find that the power conversion efficiency (PCE) increases when the weight-average molecular weight (MW) is increased from 17kDa (PCE: 4.0%) to 34 kDa (PCE: 6.6%), while a further increase in MW leads to a reduced PCE of 4.4%. We demonstrate that the charge generation efficiency, as estimated from time-delayed collection field (TDCF) experiments, varies with the P3HT molecular weight and is the reason for the differences in photocurrent and device performance. Our findings provide insight into the fundamental photophysical reasons of the molecular weight dependence of the power conversion efficiency, which has to be taken into account when using polymer-based non-fullerene acceptor blends in solar cell devices and modules.
dc.description.sponsorshipThe research reported in this publication was supported by the Office of Sponsored Research (OSR) under the Grant Agreement FCS/1/3321/01 and by baseline funding from the King Abdullah University of Science and Technology (KAUST). M. A. A. is grateful to Saudi Basic Industries Corporation (SABIC) for funding received towards the PhD. H.N.M. thanks the KAUST SRSI program for support.J.I.K. and R.S.A. contributed equally to the work.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/solr.201900023
dc.rightsArchived with thanks to Solar RRL
dc.subjectnon-fullerene acceptors
dc.subjecttransient absorption
dc.subjectmolecular weight
dc.subjectP3HT
dc.subjectO-IDTBR
dc.titleP3HT Molecular Weight Determines the Performance of P3HT:O-IDTBR Solar Cells
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentThe KAUST School
dc.identifier.journalSolar RRL
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of ChemistryGovernment College University Lahore 54000 Lahore Pakistan
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Imperial College London London SW7 2AZ UK Imperial College, London UK
kaust.personKhan, Jafar Iqbal
kaust.personAshraf, Raja
kaust.personAlamoudi, Maha
kaust.personNabi, Mohammed N.
kaust.personMohammed, Hamza N.
kaust.personFirdaus, Yuliar
kaust.personZhang, Weimin
kaust.personAnthopoulos, Thomas D.
kaust.personMcCulloch, Iain
kaust.personLaquai, Frederic
kaust.grant.numberFCS/1/3321/01
refterms.dateFOA2020-04-29T00:00:00Z


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