Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled

Handle URI:
http://hdl.handle.net/10754/621617
Title:
Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled
Authors:
Zhao, Kui ( 0000-0001-9348-7943 ) ; Wodo, Olga; Ren, Dingding; Khan, Hadayat Ullah; Niazi, Muhammad Rizwan ( 0000-0003-0449-1559 ) ; Hu, Hanlin ( 0000-0001-5617-0998 ) ; Abdelsamie, Maged ( 0000-0002-4631-5409 ) ; Li, Ruipeng; Li, Erqiang ( 0000-0002-5003-0756 ) ; Yu, Liyang; Yan, Buyi; Payne, Marcia M.; Smith, Jeremy; Anthony, John E.; Anthopoulos, Thomas D.; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Ganapathysubramanian, Baskar; Amassian, Aram ( 0000-0002-5734-1194 )
Abstract:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Blending of small-molecule organic semiconductors (OSCs) with amorphous polymers is known to yield high performance organic thin film transistors (OTFTs). Vertical stratification of the OSC and polymer binder into well-defined layers is crucial in such systems and their vertical order determines whether the coating is compatible with a top and/or a bottom gate OTFT configuration. Here, we investigate the formation of blends prepared via spin-coating in conditions which yield bilayer and trilayer stratifications. We use a combination of in situ experimental and computational tools to study the competing effects of formulation thermodynamics and process kinetics in mediating the final vertical stratification. It is shown that trilayer stratification (OSC/polymer/OSC) is the thermodynamically favored configuration and that formation of the buried OSC layer can be kinetically inhibited in certain conditions of spin-coating, resulting in a bilayer stack instead. The analysis reveals here that preferential loss of the OSC, combined with early aggregation of the polymer phase due to rapid drying, inhibit the formation of the buried OSC layer. The fluid dynamics and drying kinetics are then moderated during spin-coating to promote trilayer stratification with a high quality buried OSC layer which yields unusually high mobility >2 cm2 V-1 s-1 in the bottom-gate top-contact configuration.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Zhao K, Wodo O, Ren D, Khan HU, Niazi MR, et al. (2016) Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled. Advanced Functional Materials 26: 1737–1746. Available: http://dx.doi.org/10.1002/adfm.201503943.
Publisher:
Wiley-Blackwell
Journal:
Advanced Functional Materials
Issue Date:
3-Feb-2016
DOI:
10.1002/adfm.201503943
Type:
Article
ISSN:
1616-301X
Sponsors:
Part of this work was supported by the KAUST Office of Competitive Research under the Competitive Research Grants (round 1) program. A. A. is grateful to SABIC for the Career Development SABIC chair. B.G. acknowledges support in part from NSF 1435587.
Additional Links:
http://onlinelibrary.wiley.com/doi/10.1002/adfm.201503943/full
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhao, Kuien
dc.contributor.authorWodo, Olgaen
dc.contributor.authorRen, Dingdingen
dc.contributor.authorKhan, Hadayat Ullahen
dc.contributor.authorNiazi, Muhammad Rizwanen
dc.contributor.authorHu, Hanlinen
dc.contributor.authorAbdelsamie, Mageden
dc.contributor.authorLi, Ruipengen
dc.contributor.authorLi, Erqiangen
dc.contributor.authorYu, Liyangen
dc.contributor.authorYan, Buyien
dc.contributor.authorPayne, Marcia M.en
dc.contributor.authorSmith, Jeremyen
dc.contributor.authorAnthony, John E.en
dc.contributor.authorAnthopoulos, Thomas D.en
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorGanapathysubramanian, Baskaren
dc.contributor.authorAmassian, Aramen
dc.date.accessioned2016-11-03T08:33:27Z-
dc.date.available2016-11-03T08:33:27Z-
dc.date.issued2016-02-03en
dc.identifier.citationZhao K, Wodo O, Ren D, Khan HU, Niazi MR, et al. (2016) Vertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlled. Advanced Functional Materials 26: 1737–1746. Available: http://dx.doi.org/10.1002/adfm.201503943.en
dc.identifier.issn1616-301Xen
dc.identifier.doi10.1002/adfm.201503943en
dc.identifier.urihttp://hdl.handle.net/10754/621617-
dc.description.abstract© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Blending of small-molecule organic semiconductors (OSCs) with amorphous polymers is known to yield high performance organic thin film transistors (OTFTs). Vertical stratification of the OSC and polymer binder into well-defined layers is crucial in such systems and their vertical order determines whether the coating is compatible with a top and/or a bottom gate OTFT configuration. Here, we investigate the formation of blends prepared via spin-coating in conditions which yield bilayer and trilayer stratifications. We use a combination of in situ experimental and computational tools to study the competing effects of formulation thermodynamics and process kinetics in mediating the final vertical stratification. It is shown that trilayer stratification (OSC/polymer/OSC) is the thermodynamically favored configuration and that formation of the buried OSC layer can be kinetically inhibited in certain conditions of spin-coating, resulting in a bilayer stack instead. The analysis reveals here that preferential loss of the OSC, combined with early aggregation of the polymer phase due to rapid drying, inhibit the formation of the buried OSC layer. The fluid dynamics and drying kinetics are then moderated during spin-coating to promote trilayer stratification with a high quality buried OSC layer which yields unusually high mobility >2 cm2 V-1 s-1 in the bottom-gate top-contact configuration.en
dc.description.sponsorshipPart of this work was supported by the KAUST Office of Competitive Research under the Competitive Research Grants (round 1) program. A. A. is grateful to SABIC for the Career Development SABIC chair. B.G. acknowledges support in part from NSF 1435587.en
dc.publisherWiley-Blackwellen
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/adfm.201503943/fullen
dc.subjectIn situ UV-vis absorptionen
dc.subjectOrganic thin film transistorsen
dc.subjectPhase field simulationsen
dc.subjectPolymer-molecule blendsen
dc.subjectVertical phase separationen
dc.titleVertical Phase Separation in Small Molecule:Polymer Blend Organic Thin Film Transistors Can Be Dynamically Controlleden
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalAdvanced Functional Materialsen
dc.contributor.institutionDepartment of Mechanical Engineering; Iowa State University; Ames IA 50011 USAen
dc.contributor.institutionDepartment of Materials Design and Innovation; University at Buffalo; Buffalo NY 14260 USAen
dc.contributor.institutionDepartment of Mechanical and Aerospace Engineering; University at Buffalo; Buffalo NY 14260 USAen
dc.contributor.institutionThin Film Electronics AB; Westmansgatan 27 58216 Linkoping Swedenen
dc.contributor.institutionDepartment of Chemistry; University of Kentucky; Lexington KY 40506 USAen
dc.contributor.institutionCentre for Plastic Electronics and Department of Physics; Blackett Laboratory; Imperial College London; London SW7 2BW UKen
kaust.authorZhao, Kuien
kaust.authorRen, Dingdingen
kaust.authorKhan, Hadayat Ullahen
kaust.authorNiazi, Muhammad Rizwanen
kaust.authorHu, Hanlinen
kaust.authorAbdelsamie, Mageden
kaust.authorLi, Ruipengen
kaust.authorLi, Erqiangen
kaust.authorYu, Liyangen
kaust.authorYan, Buyien
kaust.authorThoroddsen, Sigurdur T.en
kaust.authorAmassian, Aramen
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