Single-molecule functionality in electronic components based on orbital resonances
| Autor: | Mickael L. Perrin, Ferdinand C. Grozema, Herre S. J. van der Zant, Jos Thijssen, Rienk Eelkema |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Rectification Coupling (computer programming) visual_art Electrode Electronic component visual_art.visual_art_medium Molecule Optoelectronics Physical and Theoretical Chemistry 0210 nano-technology Break junction business Chemical design Diode |
| Zdroj: | Physical chemistry chemical physics : PCCP. 22(23) |
| ISSN: | 1463-9084 |
| Popis: | In recent years, a wide range of single-molecule devices has been realized, enabled by technological advances combined with the versatility offered by synthetic chemistry. In particular, single-molecule diodes have attracted significant attention with an ongoing effort to increase the rectification ratio between the forward and reverse current. Various mechanisms have been investigated to improve rectification, either based on molecule-intrinsic properties or by engineering the coupling of the molecule to the electrodes. In this perspective, we first provide an overview of the current experimental approaches reported in literature to achieve rectification at the single-molecule level. We then proceed with our recent efforts in this direction, exploiting the internal structure of multi-site molecules, yielding the highest rectification ratio based on a molecule-intrinsic mechanism. We introduce the theoretical framework for multi-site molecules and infer general design guidelines from this. Based on these guidelines, a series of two-site molecules have been developed and integrated into devices. Using two- and three-terminal mechanically controllable break junction measurements, we show that depending on the on-site energies, which are tunable by chemical design, the devices either exhibit pronounced negative differential conductance, or behave as highly-efficient rectifiers. Finally, we propose a design of a single-molecule diode with a theoretical rectification ratio exceeding a million. |
| Databáze: | OpenAIRE |
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