Show simple item record

Files in this item

Thumbnail

Item metadata

dc.contributor.authorKrishnan Jagadamma, Lethy
dc.contributor.authorSajjad, Muhammad Tariq
dc.contributor.authorSavikhin , Victoria
dc.contributor.authorToney, Michael
dc.contributor.authorSamuel, Ifor D. W.
dc.date.accessioned2018-06-08T23:31:51Z
dc.date.available2018-06-08T23:31:51Z
dc.date.issued2017-07-28
dc.identifier.citationKrishnan Jagadamma , L , Sajjad , M T , Savikhin , V , Toney , M & Samuel , I D W 2017 , ' Correlating photovoltaic properties of PTB7-Th:PC71BM blend to photophysics and microstructure as a function of thermal annealing ' , Journal of Materials Chemistry A , vol. 5 , no. 28 , pp. 14646-14657 . https://doi.org/10.1039/C7TA03144Ken
dc.identifier.issn2050-7488
dc.identifier.otherPURE: 250227448
dc.identifier.otherPURE UUID: 465136b3-0a72-4df2-b317-8187560deadd
dc.identifier.otherScopus: 85025096793
dc.identifier.otherORCID: /0000-0002-4339-2484/work/60196630
dc.identifier.otherWOS: 000405689000020
dc.identifier.urihttps://hdl.handle.net/10023/13866
dc.descriptionWe acknowledge support from EPSRC (grant number EP/L012294/1) and the European Research Council (grant number 321305). I.D.W.S. also acknowledges a Royal Society Wolfson Research Merit Award. VS acknowledges support from the Office of Naval Research NDSEG fellowship. Research data supporting this paper is available at doi http://dx.doi.org/10.17630/eadf56f3-8c70-47da-ac6d-67f2d78b3f74en
dc.description.abstractSelective optimisation of light harvesting materials and interface properties has brought breakthroughs in power conversion efficiency (11-12 %) of organic photovoltaics (OPVs). However to translate this promising efficiency to economically viable applications, long term stability is a fundamental requirement. A number of degradation pathways, both extrinsic and intrinsic, reduce the long term stability of OPVs. Here, the photovoltaic properties of a highly efficient bulk heterojunction PTB7-Th:PC71BM blend were investigated as a function of thermal annealing. The changes in charge generation, separation, and transport due to thermal annealing were measured and related to changes in the microstructure and photovoltaic performance. A 30 % drop in power conversion efficiency of PTB7-Th:PC71BM blends upon thermal annealing at 150 oC was identified as mainly due to morphological instability induced by strong phase separation of donor and acceptor molecules of the blend films. Based on the insight gained from these investigations, enhanced thermal stability was demonstrated by replacing the PC71BM fullerene acceptor with the non-fullerene acceptor ITIC, for which power conversion efficiency dropped only by 9 % upon thermal annealing at 150 oC.
dc.format.extent12
dc.language.isoeng
dc.relation.ispartofJournal of Materials Chemistry Aen
dc.rights© 2017, Royal Society of Chemistry. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at pubs.rsc.org / https://doi.org/10.1039/C7TA03144Ken
dc.subjectQC Physicsen
dc.subjectQD Chemistryen
dc.subjectDASen
dc.subjectSDG 7 - Affordable and Clean Energyen
dc.subject.lccQCen
dc.subject.lccQDen
dc.titleCorrelating photovoltaic properties of PTB7-Th:PC71BM blend to photophysics and microstructure as a function of thermal annealingen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Organic Semiconductor Centreen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doihttps://doi.org/10.1039/C7TA03144K
dc.description.statusPeer revieweden
dc.date.embargoedUntil2018-06-08
dc.identifier.grantnumberEP/L012294/1en


This item appears in the following Collection(s)

Show simple item record