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dc.contributor.authorGasparini, Nicola
dc.contributor.authorSalvador, Michael
dc.contributor.authorStrohm, Sebastian
dc.contributor.authorHeumueller, Thomas
dc.contributor.authorLevchuk, Ievgen
dc.contributor.authorWadsworth, Andrew
dc.contributor.authorBannock, James H.
dc.contributor.authorde Mello, John C.
dc.contributor.authorEgelhaaf, Hans-Joachim
dc.contributor.authorBaran, Derya
dc.contributor.authorMcCulloch, Iain
dc.contributor.authorBrabec, Christoph J.
dc.date.accessioned2018-02-12T08:25:46Z
dc.date.available2018-02-12T08:25:46Z
dc.date.issued2017-07-03
dc.identifier.citationGasparini N, Salvador M, Strohm S, Heumueller T, Levchuk I, et al. (2017) Burn-in Free Nonfullerene-Based Organic Solar Cells. Advanced Energy Materials 7: 1700770. Available: http://dx.doi.org/10.1002/aenm.201700770.
dc.identifier.issn1614-6832
dc.identifier.doi10.1002/aenm.201700770
dc.identifier.urihttp://hdl.handle.net/10754/627078
dc.description.abstractOrganic solar cells that are free of burn-in, the commonly observed rapid performance loss under light, are presented. The solar cells are based on poly(3-hexylthiophene) (P3HT) with varying molecular weights and a nonfullerene acceptor (rhodanine-benzothiadiazole-coupled indacenodithiophene, IDTBR) and are fabricated in air. P3HT:IDTBR solar cells light-soaked over the course of 2000 h lose about 5% of power conversion efficiency (PCE), in stark contrast to [6,6]-Phenyl C61 butyric acid methyl ester (PCBM)-based solar cells whose PCE shows a burn-in that extends over several hundreds of hours and levels off at a loss of ≈34%. Replacing PCBM with IDTBR prevents short-circuit current losses due to fullerene dimerization and inhibits disorder-induced open-circuit voltage losses, indicating a very robust device operation that is insensitive to defect states. Small losses in fill factor over time are proposed to originate from polymer or interface defects. Finally, the combination of enhanced efficiency and stability in P3HT:IDTBR increases the lifetime energy yield by more than a factor of 10 when compared with the same type of devices using a fullerene-based acceptor instead.
dc.description.sponsorshipN.G. and M.S. contributed equally to this work. The authors gratefully acknowledge the support of the Cluster of Excellence “Engineering of Advanced Materials” at the University of Erlangen–Nuremberg, which is funded by the German Research Foundation (DFG) within the framework of its “Excellence Initiative,” Synthetic Carbon Allotropes (SFB953) and Solar Technologies go Hybrid (SolTech). M.S. acknowledges primary support from a fellowship by the Portuguese Fundação para a Ciência e a Tecnologia (SFRH/BPD/71816/2010). The authors wish to thank Dr. Siva Krishnadasan (Department of Chemistry, Imperial College, London) for assistance in the preparation of P3HT and Dr. Florian Machui (ZAE Bayern) for fruitful discussions for device preparation.
dc.publisherWiley-Blackwell
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/aenm.201700770/full
dc.rightsThis is the peer reviewed version of the following article: Burn-in Free Nonfullerene-Based Organic Solar Cells, which has been published in final form at http://doi.org/10.1002/aenm.201700770. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
dc.subjectDegradation
dc.subjectLight-soaking stability
dc.subjectNonfullerene acceptor
dc.subjectOrganic solar cells
dc.subjectP3HT
dc.titleBurn-in Free Nonfullerene-Based Organic Solar Cells
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentChemical Science Program
dc.identifier.journalAdvanced Energy Materials
dc.eprint.versionPost-print
dc.contributor.institutionInstitute of Materials for Electronics and Energy Technology (I-MEET); Friedrich-Alexander-University Erlangen-Nuremberg; Martensstraße 7 91058 Erlangen Germany
dc.contributor.institutionInstituto de Telecomunicações; Instituto Superior Técnico; Av. Rovisco Pais P-1049-001 Lisboa Portugal
dc.contributor.institutionBavarian Center for Applied Energy Research (ZAE Bayern); Haberstrasse 2a 91058 Erlangen Germany
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics; Imperial College London; London SW7 2AZ UK
kaust.personBaran, Derya
kaust.personMcCulloch, Iain


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