Optical Modulation of Molecular Conductance

Authors: Battacharyya, S., Kibel, A., Kodis, G., Liddell, P. A., Gervaldo, M., Gust, D., and Lindsay, S.
Title: Optical Modulation of Molecular Conductance
Source: Nano Letters
Year: 2011
Volume: 11
Pages: 2709–2714


A novel scanning probe microscope stage permits break junction measurements of single molecule conductance while the molecules are illuminated with visible light. We studied a porphyrin-fullerene dyad molecule designed to form a charge separated state on illumination. A significant fraction of illuminated molecules become more conductive, returning to a lower conductance in the dark, suggesting the formation of a long-lived charge separated state on the indium–tin oxide surface. Transient absorption spectra of these molecular layers are consistent with formation of a long-lived charge separated state, a finding with implications for the design of molecular photovoltaic devices.

DOI: 10.1021/nl200977c. June 2011

Date of online publication: Thu, 2011-06-09
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