Using diverse theoretical approaches to study electron transport through organic molecules

Jun Li; Gil Speyer; Otto F. Sankey

doi:10.1117/12.531618

16 June 2004 Using diverse theoretical approaches to study electron transport through organic molecules

Jun Li, Gil Speyer, Otto F. Sankey

Proceedings Volume 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII; (2004) https://doi.org/10.1117/12.531618
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

We use different theoretical approaches to demonstrate the qualitative and quantitative understanding of coherent electron tunneling transport through several organic molecules. Molecules that we consider are phenylenevinylene oligomer (OPV5), carotene, dithienylethene, and xyxyldithiol. The complex bandstructure technique is useful for molecules that have repeating units, and is used here to make estimates of the conductance and its dependence on molecular length for OPV5 and for carotene (in a charge state). For molecules of a general shape, such as that of the photoswitching dithienylethenes, we use Landauer theory to predict the I-V properties. The same analysis is used to study the conductance of xyxyldithiol molecules that are deformed by stretching as in AFM pulling experiments.

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Jun Li, Gil Speyer, and Otto F. Sankey "Using diverse theoretical approaches to study electron transport through organic molecules", Proc. SPIE 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII, (16 June 2004); https://doi.org/10.1117/12.531618

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