Publikation: Photoconductance of organic single-molecule contacts
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2007
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Physical Review B. 2007, 76(3). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.76.033403
Zusammenfassung
We study the dc conductance of organic single-molecule contacts in the presence of external electromagnetic radiation (photoconductance). In agreement with previous predictions, we find that the radiation can lead to large enhancements of the conductance of such contacts by bringing off-resonant levels into resonance through photoassisted processes. In our analysis, we make use of the simplifying fact that, under certain assumptions, the photoconductance can be expressed in terms of the transmission function in the absence of the radiation. The conductance enhancement is demonstrated for oligophenylene molecules between gold electrodes, whose electronic structure is calculated based on density-functional theory. It is shown that the exponential decay of the conductance with the length of the molecule can be replaced by a length-independent value in the presence of radiation.
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VILJAS, Janne K., Fabian PAULY, Juan Carlos CUEVAS, 2007. Photoconductance of organic single-molecule contacts. In: Physical Review B. 2007, 76(3). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.76.033403BibTex
@article{Viljas2007Photo-21163,
year={2007},
doi={10.1103/PhysRevB.76.033403},
title={Photoconductance of organic single-molecule contacts},
number={3},
volume={76},
issn={1098-0121},
journal={Physical Review B},
author={Viljas, Janne K. and Pauly, Fabian and Cuevas, Juan Carlos}
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