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dc.contributor.authorShuttle, Christopher G.
dc.contributor.authorTreat, Neil D.
dc.contributor.authorDouglas, Jessica D.
dc.contributor.authorFrechet, Jean
dc.contributor.authorChabinyc, Michael L.
dc.date.accessioned2015-08-03T09:34:20Z
dc.date.available2015-08-03T09:34:20Z
dc.date.issued2011-11-23
dc.identifier.issn16146832
dc.identifier.doi10.1002/aenm.201100541
dc.identifier.urihttp://hdl.handle.net/10754/561929
dc.description.abstractThe nature of energetic disorder in organic semiconductors is poorly understood. In photovoltaics, energetic disorder leads to reductions in the open circuit voltage and contributes to other loss processes. In this work, three independent optoelectronic methods were used to determine the long-lived carrier populations in a high efficiency N-alkylthieno[3,4-c]pyrrole-4,6-dione (TPD) based polymer: fullerene solar cell. In the TPD co-polymer, all methods indicate the presence of a long-lived carrier population of ∼ 10 15 cm -3 on timescales ≤100 μs. Additionally, the behavior of these photovoltaic devices under optical bias is consistent with deep energetic lying trap states. Comparative measurements were also performed on high efficiency poly-3-hexylthiophene (P3HT): fullerene solar cells; however a similar long-lived carrier population was not observed. This observation is consistent with a higher acceptor concentration (doping) in P3HT than in the TPD-based copolymer. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.description.sponsorshipWork at UCSB was supported as part of the Center for Energy Efficient Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001009 and at UCB by the "Plastics Electronics" program at Lawrence Berkeley National Laboratory funded by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. We thank Claudia Piliego and Claire H. Woo for advice about device fabrication with PBDTTPD.
dc.publisherWiley-Blackwell
dc.titleDeep energetic trap states in organic photovoltaic devices
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalAdvanced Energy Materials
dc.contributor.institutionMaterials Department, University of California, Santa Barbara, CA 93106, United States
dc.contributor.institutionMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
dc.contributor.institutionDepartment of Chemistry, University of California, Berkeley, CA 94720-1460, United States
kaust.personFrechet, Jean


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