Switchable Charge Injection Barrier in an Organic Supramolecular Semiconductor
| Autor: | Hans-Werner Schmidt, Andrey V. Gorbunov, R. Helen Zha, Martijn Kemerink, Indre Urbanavičiu̅tė, Tristan Putzeys, E. W. Meijer, Milan Kivala, Andreas T. Haedler, Michael Wübbenhorst |
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| Přispěvatelé: | Molecular Materials and Nanosystems, Macro-Organic Chemistry, Institute for Complex Molecular Systems |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Supramolecular chemistry Nanotechnology 02 engineering and technology rectification 010402 general chemistry 01 natural sciences memories Inorganic Chemistry Rectification organic semiconductors current switching polarization dipolar switching injection barrier General Materials Science Thin film Polarization (electrochemistry) Diode Oorganisk kemi business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Organic semiconductor Semiconductor Electrode Optoelectronics 0210 nano-technology business |
| Zdroj: | ACS Applied Materials & Interfaces, 8(24), 15535-15542. American Chemical Society |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b02988 |
| Popis: | 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 Jr-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 lowcost, large-area, nonvolatile organic memories. Funding Agencies|NWO Nano program; Bavarian State Ministry of Science, Research, and the Arts for the Collaborative Research Network Solar Technologies go Hybrid; Deutsche Forschungsgemeinschaft (DFG) [SFB 953]; Vetenskapsradet [2015-03813] |
| Databáze: | OpenAIRE |
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