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Switchable Charge Injection Barrier in an Organic Supramolecular Semiconductor

Title data

Gorbunov, Andrey V. ; Haedler, Andreas T. ; Putzeys, Tristan ; Zha, R. Helen ; Schmidt, Hans-Werner ; Kivala, Milan ; Urbanavičiu̅tė, Indre ; Wübbenhorst, Michael ; Meijer, Egbert W. ; Kemerink, Martijn:
Switchable Charge Injection Barrier in an Organic Supramolecular Semiconductor.
In: ACS Applied Materials & Interfaces. Vol. 8 (2016) Issue 24 . - pp. 15535-15542.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.6b02988

Project information

Project title:
Project's official titleProject's id
Solar Technologies Go HybridNo information

Project financing: Bayerisches Staatsministerium für Wissenschaft, Forschung und Kunst

Abstract in another language

We disclose a supramolecular material that combines semiconducting and dipolar functionalities. The material consists of a discotic semiconducting carbonyl-bridged triarylamine core, which is surrounded by three dipolar amide groups. In thin films, the material self-organizes in a hexagonal columnar fashion through π-stacking of the molecular core and hydrogen bonding between the amide groups. Alignment by an electrical field in a simple metal/semiconductor/metal geometry induces a polar order in the interface layers near the metal contacts that can be reversibly switched, while the bulk material remains nonpolarized. On suitably chosen electrodes, the presence of an interfacial polarization field leads to a modulation of the barrier for charge injection into the semiconductor. Consequently, a reversible switching is possible between a high-resistance, injection-limited off-state and a low-resistance, space-charge-limited on-state. The resulting memory diode shows switchable rectification with on/off ratios of up to two orders of magnitude. This demonstrated multifunctionality of a single material is a promising concept toward possible application in low-cost, large-area, nonvolatile organic memories.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: PubMed PMID: 27246280
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I > Chair Macromolecular Chemistry I - Univ.-Prof. Dr. Hans-Werner Schmidt
Profile Fields > Advanced Fields > Polymer and Colloid Science
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 08 Feb 2017 07:26
Last Modified: 08 Feb 2017 07:26
URI: https://eref.uni-bayreuth.de/id/eprint/35931