Solvent-dependent self-assembly and ordering in slow-drying semi-crystalline conjugated polymer solutions

Handle URI:
http://hdl.handle.net/10754/577256
Title:
Solvent-dependent self-assembly and ordering in slow-drying semi-crystalline conjugated polymer solutions
Authors:
Zhao, Kui; Yu, Xinhong; Li, Ruipeng; Amassian, Aram ( 0000-0002-5734-1194 ) ; Han, Yanchun
Abstract:
The mechanistic understanding of the intrinsic molecular self-assembly of conjugated polymers is of immense importance to controlling the microstructure development in organic semiconducting thin films, with meaningful impact on charge transport and optoelectronic properties. Yet, to date the vast majority of studies have focused on the fast solution process itself, with studies of slower intrinsic molecular self-assembly in formulations lagging behind. Here we have investigated molecular self-assembly during spontaneous organization and uncovered how changes in formulation influence the microstructure, morphology and transport properties of conjugated polymer thin films. Our results suggest that the polymer-solvent interaction is the key factor for the molecular self-assembly and changes in macroscopic charge transport, which is in contrast with most solution processes, such as spin-coating and blade coating, where solvent drying kinetics dominates the aggregation and crystallization processes. Energetically favourable interactions between the polymer and its solvent are shown to cause chain expansion, resulting in a large hydrodynamic volume and few chain entanglements in solution. This provides molecular freedom for self-assembly and is shown to greatly enhance the local and long range order of the polymer, intra-chain backbone planarity and crystallite size. These improvements, in turn, are shown to endow the conjugated polymer with high carrier transport, as demonstrated by organic thin film transistors.
KAUST Department:
Materials Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Solvent-dependent self-assembly and ordering in slow-drying semi-crystalline conjugated polymer solutions 2015 J. Mater. Chem. C
Publisher:
Royal Society of Chemistry (RSC)
Journal:
J. Mater. Chem. C
Issue Date:
7-Sep-2015
DOI:
10.1039/C5TC02415C
Type:
Article
ISSN:
2050-7526; 2050-7534
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC02415C
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorZhao, Kuien
dc.contributor.authorYu, Xinhongen
dc.contributor.authorLi, Ruipengen
dc.contributor.authorAmassian, Aramen
dc.contributor.authorHan, Yanchunen
dc.date.accessioned2015-09-13T12:29:44Zen
dc.date.available2015-09-13T12:29:44Zen
dc.date.issued2015-09-07en
dc.identifier.citationSolvent-dependent self-assembly and ordering in slow-drying semi-crystalline conjugated polymer solutions 2015 J. Mater. Chem. Cen
dc.identifier.issn2050-7526en
dc.identifier.issn2050-7534en
dc.identifier.doi10.1039/C5TC02415Cen
dc.identifier.urihttp://hdl.handle.net/10754/577256en
dc.description.abstractThe mechanistic understanding of the intrinsic molecular self-assembly of conjugated polymers is of immense importance to controlling the microstructure development in organic semiconducting thin films, with meaningful impact on charge transport and optoelectronic properties. Yet, to date the vast majority of studies have focused on the fast solution process itself, with studies of slower intrinsic molecular self-assembly in formulations lagging behind. Here we have investigated molecular self-assembly during spontaneous organization and uncovered how changes in formulation influence the microstructure, morphology and transport properties of conjugated polymer thin films. Our results suggest that the polymer-solvent interaction is the key factor for the molecular self-assembly and changes in macroscopic charge transport, which is in contrast with most solution processes, such as spin-coating and blade coating, where solvent drying kinetics dominates the aggregation and crystallization processes. Energetically favourable interactions between the polymer and its solvent are shown to cause chain expansion, resulting in a large hydrodynamic volume and few chain entanglements in solution. This provides molecular freedom for self-assembly and is shown to greatly enhance the local and long range order of the polymer, intra-chain backbone planarity and crystallite size. These improvements, in turn, are shown to endow the conjugated polymer with high carrier transport, as demonstrated by organic thin film transistors.en
dc.language.isoenen
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC02415Cen
dc.rightsArchived with thanks to J. Mater. Chem. Cen
dc.titleSolvent-dependent self-assembly and ordering in slow-drying semi-crystalline conjugated polymer solutionsen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalJ. Mater. Chem. Cen
dc.eprint.versionPost-printen
dc.contributor.institutionSchool of Materials Science and Engineering, Shaanx i Normal University, Xian 710119, People’s Republic of Chinaen
dc.contributor.institutionState Key Laboratory of Polymer Physics and Chemist ry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Ch angchun 130022, People’s Republic of Chinaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAmassian, Aramen
kaust.authorLi, Ruipengen
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