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Self-assembled PCBM nanosheets: a facile route to electronic layer-on-Layer heterostructures
Umeå University, Faculty of Science and Technology, Department of Physics. Department of Physics, University of California, Berkeley, California 94720, United States ‡ Department of Physics, Umeå University, SE-901 87 Umeå, Sweden § Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States ∥ Kavli Energy NanoSciences Institute at the University of California, Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.ORCID iD: 0000-0002-1314-5407
Umeå University, Faculty of Science and Technology, Department of Physics.
Umeå University, Faculty of Science and Technology, Department of Physics.
Department of Physics, University of California, Berkeley, California 94720, United States.
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2018 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 18, no 2, p. 1442-1447Article in journal, Editorial material (Refereed) Published
Abstract [en]

We report on the self-assembly of semicrystalline [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) nanosheets at the interface between a hydrophobic solvent and water, and utilize this opportunity for the realization of electronically active organic/organic molecular heterostructures. The self-assembled PCBM nanosheets can feature a lateral size of >1 cm2 and be transferred from the water surface to both hydrophobic and hydrophilic surfaces using facile transfer techniques. We employ a transferred single PCBM nanosheet as the active material in a field-effect transistor (FET) and verify semiconductor function by a measured electron mobility of 1.2 × 10–2 cm2 V–1 s–1 and an on–off ratio of ∼1 × 104. We further fabricate a planar organic/organic heterostructure with the p-type organic semiconductor poly(3-hexylthiophene-2,5-diyl) as the bottom layer and the n-type PCBM nanosheet as the top layer and demonstrate ambipolar FET operation with an electron mobility of 8.7 × 10–4 cm2 V–1 s–1 and a hole mobility of 3.1 × 10–4 cm2V–1 s–1.

Place, publisher, year, edition, pages
2018. Vol. 18, no 2, p. 1442-1447
Keywords [en]
Organic electronic; organic heterostructures; PCBM nanosheets; self-assembly
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:umu:diva-144566DOI: 10.1021/acs.nanolett.7b05205ISI: 000425559700114PubMedID: 29364679OAI: oai:DiVA.org:umu-144566DiVA, id: diva2:1180713
Available from: 2018-02-06 Created: 2018-02-06 Last updated: 2018-06-13Bibliographically approved

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Barzegar, Hamid RezaLarsen, ChristianBoulanger, NicolasEdman, LudvigWågberg, Thomas

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