Luzio, Alessandro, Nuebling, Fritz, Martin, Jaime, Fazzi, Daniele, Selter, Philipp, Gann, Eliot, McNeill, Christopher R. ORCID: 0000-0001-5221-878X, Brinkmann, Martin, Hansen, Michael Ryan ORCID: 0000-0001-7114-8051, Stingelin, Natalie ORCID: 0000-0002-1414-4545, Sommer, Michael and Caironi, Mario (2019). Microstructural control suppresses thermal activation of electron transport at room temperature in polymer transistors. Nat. Commun., 10. LONDON: NATURE PUBLISHING GROUP. ISSN 2041-1723

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Abstract

Recent demonstrations of inverted thermal activation of charge mobility in polymer field-effect transistors have excited the interest in transport regimes not limited by thermal barriers. However, rationalization of the limiting factors to access such regimes is still lacking. An improved understanding in this area is critical for development of new materials, establishing processing guidelines, and broadening of the range of applications. Here we show that precise processing of a diketopyrrolopyrrole-tetrafluorobenzene-based electron transporting copolymer results in single crystal-like and voltage-independent mobility with vanishing activation energy above 280 K. Key factors are uniaxial chain alignment and thermal annealing at temperatures within the melting endotherm of films. Experimental and computational evidences converge toward a picture of electrons being delocalized within crystalline domains of increased size. Residual energy barriers introduced by disordered regions are bypassed in the direction of molecular alignment by a more efficient interconnection of the ordered domains following the annealing process.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Luzio, AlessandroUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nuebling, FritzUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Martin, JaimeUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fazzi, DanieleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Selter, PhilippUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gann, EliotUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McNeill, Christopher R.UNSPECIFIEDorcid.org/0000-0001-5221-878XUNSPECIFIED
Brinkmann, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hansen, Michael RyanUNSPECIFIEDorcid.org/0000-0001-7114-8051UNSPECIFIED
Stingelin, NatalieUNSPECIFIEDorcid.org/0000-0002-1414-4545UNSPECIFIED
Sommer, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caironi, MarioUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-134578
DOI: 10.1038/s41467-019-11125-9
Journal or Publication Title: Nat. Commun.
Volume: 10
Date: 2019
Publisher: NATURE PUBLISHING GROUP
Place of Publication: LONDON
ISSN: 2041-1723
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
FIELD-EFFECT TRANSISTORS; HIGH-MOBILITY; BAND-LIKE; CHARGE-TRANSPORT; ORGANIC TRANSISTORS; MOLECULAR-STRUCTURE; PERFORMANCE; RANGE; DESIGN; DISORDERMultiple languages
Multidisciplinary SciencesMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/13457

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