Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes

  1. Max Mennicken,
  2. Sophia K. Peter,
  3. Corinna KaulenORCID Logo,
  4. Ulrich Simon and
  5. Silvia KarthäuserORCID Logo

Submitting author affiliation: Forschungszentrum Jülich, Jülich, Germany

Beilstein Arch. 2021, 202178. https://doi.org/10.3762/bxiv.2021.78.v1

Published 11 Nov 2021

  • Preprint

Abstract

The performance of nanoelectronic and molecular electronic devices relies strongly on the employed functional units and their addressability, which is often a matter of appropriate interfaces and device design. Here, we compare two promising designs to build up solid-state electronic devices utilizing the same functional unit. Optically addressable Ru-terpyridine complexes were incorporated in supramolecular wires or employed as ligands of gold nanoparticles and contacted by nanoelectrodes. The resulting small area nanodevices were thoroughly electrically characterized as a function of temperature and light exposure. Differences in the resulting device conductance could be attributed to the device design and the respective transport mechanism: thermally activated hopping conduction in case of Ru-terpyridine wire devices or sequential tunneling in nanoparticle-based devices. Furthermore, the conductance switching of nanoparticle-based devices upon 530 nm irradiation was attributed to plasmon-induced metal-to-ligand charge-transfer in the Ru-terpyridine complexes used as switching ligands. Finally, our results reveal a superior device performance of nanoparticle-based devices compared to molecular wire devices based on Ru-terpyridine complexes as functional units.

Keywords: Conductance switching; gold nanoparticles; nanoelectronic devices; optical addressing; Ru-terpyridine wires

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When a peer-reviewed version of this preprint is available, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:

Mennicken, M.; Peter, S. K.; Kaulen, C.; Simon, U.; Karthäuser, S. Beilstein Arch. 2021, 202178. doi:10.3762/bxiv.2021.78.v1

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