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Mechanical Properties of Organic Electronic Polymers on the Nanoscale
Bruker UK, Banner Lane, Coventry CV4 9GH, UK.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. KTH Royal Institute of Technology School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Chemistry, Division of Surface and Corrosion Science Drottning Kristinas väg 51 Stockholm SE‐100 44 Sweden.ORCID iD: 0000-0001-6877-9282
Bruker Nano GmbH, Dennewartstrasse 25 52068, Aachen, Germany.
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK.
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2022 (English)In: Advanced Electronic Materials, E-ISSN 2199-160X, Vol. 8, no 3, article id 2101019Article in journal (Refereed) Published
Abstract [en]

Organic semiconducting polymers have attractive electronic, optical, and mechanical properties that make them materials of choice for large area flexible electronic devices. In these devices, the electronically active polymer components are micrometers in size, and sport negligible performance degradation upon bending the centimeter-scale flexible substrate onto which they are integrated. A closer look at the mechanical properties of the polymers, on the grain-scale and smaller, is not necessary in large area electronic applications. In emerging micromechanical and electromechanical applications where the organic polymer elements are flexed on length scales spanning their own micron-sized active areas, it becomes important to characterize the uniformity of their mechanical properties on the nanoscale. In this work, the authors use two precision nanomechanical characterization techniques, namely, atomic force microscope based PeakForce quantitative nanomechanical mapping (PF-QNM) and nanoindentation-based dynamical mechanical analysis (nano-DMA), to compare the modulus and the viscoelastic properties of organic polymers used routinely in organic electronics. They quantitatively demonstrate that the semiconducting near-amorphous organic polymer indacenodithiophene-co-benzothiadiazole (C16-IDTBT) has a higher carrier mobility, lower modulus, and greater nanoscale modulus areal uniformity compared to the semiconducting semicrystalline organic polymer poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene] (C14-PBTTT). Modulus homogeneity appears intrinsic to C16-IDTBT but can be improved in C14-PBTTT upon chemical doping. 

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 8, no 3, article id 2101019
National Category
Condensed Matter Physics
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-88163DOI: 10.1002/aelm.202101019ISI: 000722458700001Scopus ID: 2-s2.0-85119858392OAI: oai:DiVA.org:ltu-88163DiVA, id: diva2:1616254
Note

Validerad;2022;Nivå 2;2022-04-13 (sofila);

Funder: Royal Society of London (no. URF\R1\201590); Engineering and Physical Sciences Research Council (EPSRC) (no. EP/L015889/1); Belgian National Fund for Scientific Research (FNRS)

Available from: 2021-12-02 Created: 2021-12-02 Last updated: 2022-04-19Bibliographically approved

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Dobryden, Illia

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