Enhanced solid-state order and field-effect hole mobility through control of nanoscale polymer aggregation

Handle URI:
http://hdl.handle.net/10754/563162
Title:
Enhanced solid-state order and field-effect hole mobility through control of nanoscale polymer aggregation
Authors:
Chen, Mark S.; Lee, Olivia P.; Niskala, Jeremy R.; Yiu, Alan T.; Tassone, Christopher J.; Schmidt, Kristin; Beaujuge, Pierre M.; Onishi, Seita S.; Toney, Michael F.; Zettl, Alex K.; Frechet, Jean ( 0000-0001-6419-0163 )
Abstract:
Efficient charge carrier transport in organic field-effect transistors (OFETs) often requires thin films that display long-range order and close π-π packing that is oriented in-plane with the substrate. Although some polymers have achieved high field-effect mobility with such solid-state properties, there are currently few general strategies for controlling the orientation of π-stacking within polymer films. In order to probe structural effects on polymer-packing alignment, furan-containing diketopyrrolopyrrole (DPP) polymers with similar optoelectronic properties were synthesized with either linear hexadecyl or branched 2-butyloctyl side chains. Differences in polymer solubility were observed and attributed to variation in side-chain shape and polymer backbone curvature. Averaged field-effect hole mobilities of the polymers range from 0.19 to 1.82 cm2/V·s, where PDPP3F-C16 is the least soluble polymer and provides the highest maximum mobility of 2.25 cm2/V·s. Analysis of the films by AFM and GIXD reveal that less soluble polymers with linear side chains exhibit larger crystalline domains, pack considerably more closely, and align with a greater preference for in-plane π-π packing. Characterization of the polymer solutions prior to spin-coating shows a correlation between early onset nanoscale aggregation and the formation of films with highly oriented in-plane π-stacking. This effect is further observed when nonsolvent is added to PDPP3F-BO solutions to induce aggregation, which results in films with increased nanostructural order, in-plane π-π orientation, and field-effect hole mobilities. Since nearly all π-conjugated materials may be coaxed to aggregate, this strategy for enhancing solid-state properties and OFET performance has applicability to a wide variety of organic electronic materials. © 2013 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:
26-Dec-2013
DOI:
10.1021/ja4088665
Type:
Article
ISSN:
00027863
Sponsors:
This work was supported in part by the Director, Office of Science, Office of Basic Energy Sciences, Materials Science and Engineering Division, of the U.S. Department of Energy under contract no. DE-AC02-05CH11231, within the SP2-bonded Materials Program, which provided for device fabrication and electrical characterization, the Center for Advanced Molecular Photovoltaics (CAMP) under award no. KUS-C1-015-21, supported by King Abdullah University of Science and Technology (KAUST), and the Frechet "various gifts" fund for the support of research in new materials. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource user facility, operated on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. M.S.C. thanks the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry for a fellowship.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program

Full metadata record

DC FieldValue Language
dc.contributor.authorChen, Mark S.en
dc.contributor.authorLee, Olivia P.en
dc.contributor.authorNiskala, Jeremy R.en
dc.contributor.authorYiu, Alan T.en
dc.contributor.authorTassone, Christopher J.en
dc.contributor.authorSchmidt, Kristinen
dc.contributor.authorBeaujuge, Pierre M.en
dc.contributor.authorOnishi, Seita S.en
dc.contributor.authorToney, Michael F.en
dc.contributor.authorZettl, Alex K.en
dc.contributor.authorFrechet, Jeanen
dc.date.accessioned2015-08-03T11:37:13Zen
dc.date.available2015-08-03T11:37:13Zen
dc.date.issued2013-12-26en
dc.identifier.issn00027863en
dc.identifier.doi10.1021/ja4088665en
dc.identifier.urihttp://hdl.handle.net/10754/563162en
dc.description.abstractEfficient charge carrier transport in organic field-effect transistors (OFETs) often requires thin films that display long-range order and close π-π packing that is oriented in-plane with the substrate. Although some polymers have achieved high field-effect mobility with such solid-state properties, there are currently few general strategies for controlling the orientation of π-stacking within polymer films. In order to probe structural effects on polymer-packing alignment, furan-containing diketopyrrolopyrrole (DPP) polymers with similar optoelectronic properties were synthesized with either linear hexadecyl or branched 2-butyloctyl side chains. Differences in polymer solubility were observed and attributed to variation in side-chain shape and polymer backbone curvature. Averaged field-effect hole mobilities of the polymers range from 0.19 to 1.82 cm2/V·s, where PDPP3F-C16 is the least soluble polymer and provides the highest maximum mobility of 2.25 cm2/V·s. Analysis of the films by AFM and GIXD reveal that less soluble polymers with linear side chains exhibit larger crystalline domains, pack considerably more closely, and align with a greater preference for in-plane π-π packing. Characterization of the polymer solutions prior to spin-coating shows a correlation between early onset nanoscale aggregation and the formation of films with highly oriented in-plane π-stacking. This effect is further observed when nonsolvent is added to PDPP3F-BO solutions to induce aggregation, which results in films with increased nanostructural order, in-plane π-π orientation, and field-effect hole mobilities. Since nearly all π-conjugated materials may be coaxed to aggregate, this strategy for enhancing solid-state properties and OFET performance has applicability to a wide variety of organic electronic materials. © 2013 American Chemical Society.en
dc.description.sponsorshipThis work was supported in part by the Director, Office of Science, Office of Basic Energy Sciences, Materials Science and Engineering Division, of the U.S. Department of Energy under contract no. DE-AC02-05CH11231, within the SP2-bonded Materials Program, which provided for device fabrication and electrical characterization, the Center for Advanced Molecular Photovoltaics (CAMP) under award no. KUS-C1-015-21, supported by King Abdullah University of Science and Technology (KAUST), and the Frechet "various gifts" fund for the support of research in new materials. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource user facility, operated on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences. M.S.C. thanks the Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry for a fellowship.en
dc.publisherAmerican Chemical Society (ACS)en
dc.titleEnhanced solid-state order and field-effect hole mobility through control of nanoscale polymer aggregationen
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, CA 94720, United Statesen
dc.contributor.institutionDepartment of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, United Statesen
dc.contributor.institutionMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United Statesen
dc.contributor.institutionDepartment of Physics, University of California, Berkeley, CA 94720, United Statesen
dc.contributor.institutionKavli Energy Nanosciences Institute, University of California, Berkeley, CA 94720, United Statesen
dc.contributor.institutionStanford Synchrotron Radiation Lightsource, Menlo Park, CA 94025, United Statesen
kaust.authorFrechet, Jeanen
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