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Ferroelectric self-assembled molecular materials showing both rectifying and switchable conductivity
Eindhoven Univ Technol, Netherlands.
Eindhoven Univ Technol, Netherlands.
Univ Autonoma Madrid, Spain.
Linköping University, Department of Physics, Chemistry and Biology, Complex Materials and Devices. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-4728-8446
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2017 (English)In: Science Advances, ISSN 0036-8156, E-ISSN 2375-2548, Vol. 3, no 9, article id e1701017Article in journal (Refereed) Published
Abstract [en]

Advanced molecular materials that combine two or more physical properties are typically constructed by combining different molecules, each being responsible for one of the properties required. Ideally, single molecules could take care of this combined functionality, provided they are self-assembled correctly and endowed with different functional subunits whose strong electronic coupling may lead to the emergence of unprecedented and exciting properties. We present a class of disc-like semiconducting organic molecules that are functionalized with strong dipolar side groups. Supramolecular organization of these materials provides long-range polar order that supports collective ferroelectric behavior of the side groups as well as charge transport through the stacked semiconducting cores. The ferroelectric polarization in these supramolecular polymers is found to couple to the charge transport and leads to a bulk conductivity that is both switchable and rectifying. An intuitive model is developed and found to quantitatively reproduce the experimental observations. In a larger perspective, these results highlight the possibility of modulating material properties using the large electric fields associated with ferroelectric polarization.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2017. Vol. 3, no 9, article id e1701017
National Category
Textile, Rubber and Polymeric Materials
Identifiers
URN: urn:nbn:se:liu:diva-145259DOI: 10.1126/sciadv.1701017ISI: 000423949400008PubMedID: 28975150OAI: oai:DiVA.org:liu-145259DiVA, id: diva2:1184546
Note

Funding Agencies|Netherlands Organization for Scientific Research (NWO) Nano program; Ministerio de Educacion, Culture y Deporte (MECD) (FPU fellowship); MINECO, Spain [CTQ-2014-52869-P, CTQ2014-57729-P]; Comunidad de Madrid [S2013/MIT-2841 FOTOCARBON]; European Research Council [StG-279548]; Dutch Polymer Institute; Dutch Ministry of Education, Culture and Science [024.001.035]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]

Available from: 2018-02-21 Created: 2018-02-21 Last updated: 2018-03-23

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Cornelissen, Tim

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