Dependence of crystallite formation and preferential backbone orientations on the side chain pattern in PBDTTPD polymers

Handle URI:
http://hdl.handle.net/10754/563873
Title:
Dependence of crystallite formation and preferential backbone orientations on the side chain pattern in PBDTTPD polymers
Authors:
El Labban, Abdulrahman ( 0000-0001-9891-0851 ) ; Warnan, Julien; Cabanetos, Clement; Ratel, Olivier; Tassone, Christopher J.; Toney, Michael F.; Beaujuge, Pierre
Abstract:
(Figure Presented) Alkyl substituents appended to the π-conjugated main chain account for the solution-processability and film-forming properties of most π-conjugated polymers for organic electronic device applications, including field-effect transistors (FETs) and bulk-heterojunction (BHJ) solar cells. Beyond film-forming properties, recent work has emphasized the determining role that side-chain substituents play on polymer self-assembly and thin-film nanostructural order, and, in turn, on device performance. However, the factors that determine polymer crystallite orientation in thin-films, implying preferential backbone orientation relative to the device substrate, are a matter of some debate, and these structural changes remain difficult to anticipate. In this report, we show how systematic changes in the side-chain pattern of poly(benzo[1,2-b:4,5-b′]dithiophene-alt-thieno[3,4-c]pyrrole-4,6-dione) (PBDTTPD) polymers can (i) influence the propensity of the polymer to order in the π-stacking direction, and (ii) direct the preferential orientation of the polymer crystallites in thin films (e.g., "face-on" vs "edge-on"). Oriented crystallites, specifically crystallites that are well-ordered in the π-stacking direction, are believed to be a key contributor to improved thin-film device performance in both FETs and BHJ solar cells.
KAUST Department:
Solar and Photovoltaic Engineering Research Center (SPERC); Physical Sciences and Engineering (PSE) Division; Chemical Science Program
Publisher:
American Chemical Society (ACS)
Journal:
ACS Applied Materials & Interfaces
Issue Date:
26-Nov-2014
DOI:
10.1021/am505280a
Type:
Article
ISSN:
19448244
Sponsors:
The authors acknowledge financial support under Baseline Research Funding from King Abdullah University of Science and Technology (KAUST). Part of this work was supported by the Center for Advanced Molecular Photovoltaics (CAMP) (Award KUS-C1-015-21) made possible by King Abdullah University of Science and Technology. The authors thank KAUST Analytical Core Laboratories for mass spectrometry and elemental analyses. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource user facility, operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorEl Labban, Abdulrahmanen
dc.contributor.authorWarnan, Julienen
dc.contributor.authorCabanetos, Clementen
dc.contributor.authorRatel, Olivieren
dc.contributor.authorTassone, Christopher J.en
dc.contributor.authorToney, Michael F.en
dc.contributor.authorBeaujuge, Pierreen
dc.date.accessioned2015-08-03T12:17:50Zen
dc.date.available2015-08-03T12:17:50Zen
dc.date.issued2014-11-26en
dc.identifier.issn19448244en
dc.identifier.doi10.1021/am505280aen
dc.identifier.urihttp://hdl.handle.net/10754/563873en
dc.description.abstract(Figure Presented) Alkyl substituents appended to the π-conjugated main chain account for the solution-processability and film-forming properties of most π-conjugated polymers for organic electronic device applications, including field-effect transistors (FETs) and bulk-heterojunction (BHJ) solar cells. Beyond film-forming properties, recent work has emphasized the determining role that side-chain substituents play on polymer self-assembly and thin-film nanostructural order, and, in turn, on device performance. However, the factors that determine polymer crystallite orientation in thin-films, implying preferential backbone orientation relative to the device substrate, are a matter of some debate, and these structural changes remain difficult to anticipate. In this report, we show how systematic changes in the side-chain pattern of poly(benzo[1,2-b:4,5-b′]dithiophene-alt-thieno[3,4-c]pyrrole-4,6-dione) (PBDTTPD) polymers can (i) influence the propensity of the polymer to order in the π-stacking direction, and (ii) direct the preferential orientation of the polymer crystallites in thin films (e.g., "face-on" vs "edge-on"). Oriented crystallites, specifically crystallites that are well-ordered in the π-stacking direction, are believed to be a key contributor to improved thin-film device performance in both FETs and BHJ solar cells.en
dc.description.sponsorshipThe authors acknowledge financial support under Baseline Research Funding from King Abdullah University of Science and Technology (KAUST). Part of this work was supported by the Center for Advanced Molecular Photovoltaics (CAMP) (Award KUS-C1-015-21) made possible by King Abdullah University of Science and Technology. The authors thank KAUST Analytical Core Laboratories for mass spectrometry and elemental analyses. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource user facility, operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectBackbone orientationen
dc.subjectBenzo[1,2-b:4,5-b′]dithiopheneen
dc.subjectPolymer crystalliteen
dc.subjectSide chainen
dc.subjectThieno[3,4-c]pyrrole-4,6-dioneen
dc.subjectπ-conjugated polymersen
dc.titleDependence of crystallite formation and preferential backbone orientations on the side chain pattern in PBDTTPD polymersen
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentChemical Science Programen
dc.identifier.journalACS Applied Materials & Interfacesen
dc.contributor.institutionStanford Synchrotron Radiation Laboratory (SSRL)Menlo Park, CA, United Statesen
kaust.authorEl Labban, Abdulrahmanen
kaust.authorWarnan, Julienen
kaust.authorCabanetos, Clementen
kaust.authorBeaujuge, Pierreen
kaust.authorRatel, Olivieren
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