Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors

Handle URI:
http://hdl.handle.net/10754/598073
Title:
Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors
Authors:
Himmelberger, Scott; Dacuña, Javier; Rivnay, Jonathan; Jimison, Leslie H.; McCarthy-Ward, Thomas; Heeney, Martin; McCulloch, Iain; Toney, Michael F.; Salleo, Alberto
Abstract:
The film thickness of one of the most crystalline and highest performing polymer semiconductors, poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b] thiophene) (PBTTT), is varied in order to determine the effects of interfaces and confinement on the microstructure and performance in organic field effect transistors (OFETs). Crystalline texture and overall film crystallinity are found to depend strongly on film thickness and thermal processing. The angular distribution of crystallites narrows upon both a decrease in film thickness and thermal annealing. These changes in the film microstructure are paired with thin-film transistor characterization and shown to be directly correlated with variations in charge carrier mobility. Charge transport is shown to be governed by film crystallinity in films below 20 nm and by crystalline orientation for thicker films. An optimal thickness is found for PBTTT at which the mobility is maximized in unannealed films and where mobility reaches a plateau at its highest value for annealed films. The effects of confinement on the morphology and charge transport properties of poly(2,5-bis(3-tetradecylthiophen-2-yl) thieno[3,2-b]thiophene) (PBTTT) are studied using quantitative X-ray diffraction and field-effect transistor measurements. Polymer crystallinity is found to limit charge transport in the thinnest films while crystalline texture and intergrain connectivity modulate carrier mobility in thicker films. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Citation:
Himmelberger S, Dacuña J, Rivnay J, Jimison LH, McCarthy-Ward T, et al. (2012) Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors. Advanced Functional Materials 23: 2091–2098. Available: http://dx.doi.org/10.1002/adfm.201202408.
Publisher:
Wiley-Blackwell
Journal:
Advanced Functional Materials
KAUST Grant Number:
KUS-C1-015-21
Issue Date:
23-Nov-2012
DOI:
10.1002/adfm.201202408
Type:
Article
ISSN:
1616-301X
Sponsors:
Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the US Department of Energy, Office of Basic Energy Sciences. A.S. and S.H. gratefully acknowledge financial support from the National Science Foundation. This publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST).
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Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorHimmelberger, Scotten
dc.contributor.authorDacuña, Javieren
dc.contributor.authorRivnay, Jonathanen
dc.contributor.authorJimison, Leslie H.en
dc.contributor.authorMcCarthy-Ward, Thomasen
dc.contributor.authorHeeney, Martinen
dc.contributor.authorMcCulloch, Iainen
dc.contributor.authorToney, Michael F.en
dc.contributor.authorSalleo, Albertoen
dc.date.accessioned2016-02-25T13:12:08Zen
dc.date.available2016-02-25T13:12:08Zen
dc.date.issued2012-11-23en
dc.identifier.citationHimmelberger S, Dacuña J, Rivnay J, Jimison LH, McCarthy-Ward T, et al. (2012) Effects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductors. Advanced Functional Materials 23: 2091–2098. Available: http://dx.doi.org/10.1002/adfm.201202408.en
dc.identifier.issn1616-301Xen
dc.identifier.doi10.1002/adfm.201202408en
dc.identifier.urihttp://hdl.handle.net/10754/598073en
dc.description.abstractThe film thickness of one of the most crystalline and highest performing polymer semiconductors, poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b] thiophene) (PBTTT), is varied in order to determine the effects of interfaces and confinement on the microstructure and performance in organic field effect transistors (OFETs). Crystalline texture and overall film crystallinity are found to depend strongly on film thickness and thermal processing. The angular distribution of crystallites narrows upon both a decrease in film thickness and thermal annealing. These changes in the film microstructure are paired with thin-film transistor characterization and shown to be directly correlated with variations in charge carrier mobility. Charge transport is shown to be governed by film crystallinity in films below 20 nm and by crystalline orientation for thicker films. An optimal thickness is found for PBTTT at which the mobility is maximized in unannealed films and where mobility reaches a plateau at its highest value for annealed films. The effects of confinement on the morphology and charge transport properties of poly(2,5-bis(3-tetradecylthiophen-2-yl) thieno[3,2-b]thiophene) (PBTTT) are studied using quantitative X-ray diffraction and field-effect transistor measurements. Polymer crystallinity is found to limit charge transport in the thinnest films while crystalline texture and intergrain connectivity modulate carrier mobility in thicker films. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en
dc.description.sponsorshipPortions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the US Department of Energy, Office of Basic Energy Sciences. A.S. and S.H. gratefully acknowledge financial support from the National Science Foundation. This publication was partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No. KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST).en
dc.publisherWiley-Blackwellen
dc.subjectcharge transporten
dc.subjectcrystallinityen
dc.subjectorganic electronicsen
dc.subjectorganic field-effect transistorsen
dc.subjectthin filmsen
dc.titleEffects of Confinement on Microstructure and Charge Transport in High Performance Semicrystalline Polymer Semiconductorsen
dc.typeArticleen
dc.identifier.journalAdvanced Functional Materialsen
dc.contributor.institutionMaterials Science and Engineering, Stanford, United Statesen
dc.contributor.institutionImperial College London, London, United Kingdomen
dc.contributor.institutionStanford Synchrotron Radiation Laboratory, Menlo Park, United Statesen
kaust.grant.numberKUS-C1-015-21en
kaust.grant.fundedcenterCenter for Advanced Molecular Photovoltaics (CAMP)en
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