Steric control of the donor/acceptor interface: Implications in organic photovoltaic charge generation

Handle URI:
http://hdl.handle.net/10754/561841
Title:
Steric control of the donor/acceptor interface: Implications in organic photovoltaic charge generation
Authors:
Holcombe, Thomas W.; Norton, Joseph E.; Rivnay, Jonathan; Woo, Claire; Goris, Ludwig J.; Piliego, Claudia; Griffini, Gianmarco; Sellinger, Alan; Brédas, Jean Luc; Salleo, Alberto; Frechet, Jean ( 0000-0001-6419-0163 )
Abstract:
The performance of organic photovoltaic (OPV) devices is currently limited by modest short-circuit current densities. Approaches toward improving this output parameter may provide new avenues to advance OPV technologies and the basic science of charge transfer in organic semiconductors. This work highlights how steric control of the charge separation interface can be effectively tuned in OPV devices. By introducing an octylphenyl substituent onto the investigated polymer backbones, the thermally relaxed charge-transfer state, and potentially excited charge-transfer states, can be raised in energy. This decreases the barrier to charge separation and results in increased photocurrent generation. This finding is of particular significance for nonfullerene OPVs, which have many potential advantages such as tunable energy levels and spectral breadth, but are prone to poor exciton separation efficiencies. Computational, spectroscopic, and synthetic methods were combined to develop a structure-property relationship that correlates polymer substituents with charge-transfer state energies and, ultimately, device efficiencies. © 2011 American Chemical Society.
KAUST Department:
Chemical Science Program; Physical Sciences and Engineering (PSE) Division
Publisher:
American Chemical Society (ACS)
Journal:
Journal of the American Chemical Society
Issue Date:
10-Aug-2011
DOI:
10.1021/ja203235z
Type:
Article
ISSN:
00027863
Sponsors:
This work was supported by the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21), supported by King Abdullah University of Science and Technology (KAUST), and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 (synthesis and some device characterization work). T.W.H., C.H.W., and J.R. thank the National Science Foundation for graduate research fellowships. We gratefully acknowledge Polyera Inc. and Paul Armstrong for providing the Active Ink N2200 and PDL respectively, used in this study. Paul Armstrong and Yoshi Miyamoto are thanked for assistance with device optimization. We also thank David Kavulak and Barry Thompson for helpful discussions.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program

Full metadata record

DC FieldValue Language
dc.contributor.authorHolcombe, Thomas W.en
dc.contributor.authorNorton, Joseph E.en
dc.contributor.authorRivnay, Jonathanen
dc.contributor.authorWoo, Claireen
dc.contributor.authorGoris, Ludwig J.en
dc.contributor.authorPiliego, Claudiaen
dc.contributor.authorGriffini, Gianmarcoen
dc.contributor.authorSellinger, Alanen
dc.contributor.authorBrédas, Jean Lucen
dc.contributor.authorSalleo, Albertoen
dc.contributor.authorFrechet, Jeanen
dc.date.accessioned2015-08-03T09:32:12Zen
dc.date.available2015-08-03T09:32:12Zen
dc.date.issued2011-08-10en
dc.identifier.issn00027863en
dc.identifier.doi10.1021/ja203235zen
dc.identifier.urihttp://hdl.handle.net/10754/561841en
dc.description.abstractThe performance of organic photovoltaic (OPV) devices is currently limited by modest short-circuit current densities. Approaches toward improving this output parameter may provide new avenues to advance OPV technologies and the basic science of charge transfer in organic semiconductors. This work highlights how steric control of the charge separation interface can be effectively tuned in OPV devices. By introducing an octylphenyl substituent onto the investigated polymer backbones, the thermally relaxed charge-transfer state, and potentially excited charge-transfer states, can be raised in energy. This decreases the barrier to charge separation and results in increased photocurrent generation. This finding is of particular significance for nonfullerene OPVs, which have many potential advantages such as tunable energy levels and spectral breadth, but are prone to poor exciton separation efficiencies. Computational, spectroscopic, and synthetic methods were combined to develop a structure-property relationship that correlates polymer substituents with charge-transfer state energies and, ultimately, device efficiencies. © 2011 American Chemical Society.en
dc.description.sponsorshipThis work was supported by the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21), supported by King Abdullah University of Science and Technology (KAUST), and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 (synthesis and some device characterization work). T.W.H., C.H.W., and J.R. thank the National Science Foundation for graduate research fellowships. We gratefully acknowledge Polyera Inc. and Paul Armstrong for providing the Active Ink N2200 and PDL respectively, used in this study. Paul Armstrong and Yoshi Miyamoto are thanked for assistance with device optimization. We also thank David Kavulak and Barry Thompson for helpful discussions.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleSteric control of the donor/acceptor interface: Implications in organic photovoltaic charge generationen
dc.typeArticleen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of the American Chemical Societyen
dc.contributor.institutionDepartment of Chemistry, University of California Berkeley, Berkeley, CA 94720-1460, United Statesen
dc.contributor.institutionDepartment of Chemical Engineering, University of California Berkeley, Berkeley, CA 94720-1460, United Statesen
dc.contributor.institutionMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United Statesen
dc.contributor.institutionDepartment of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United Statesen
dc.contributor.institutionCenter for Organic Photonics and Electronics, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, United Statesen
dc.contributor.institutionInstitute for Materials Research (IMO), Hasselt University, Diepenbeek, Belgiumen
dc.contributor.institutionDepartment of Chemisty, Politecnico di Milano, 20133 Milan, Italyen
kaust.authorFrechet, Jeanen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.