TY - JOUR
T1 - Single electron transistor with a single conjugated molecule
AU - Kubatkin, Sergey
AU - Danilov, Andrey
AU - Hjort, Mattias
AU - Cornil, Jérôme
AU - Brédas, Jean Luc
AU - Stuhr-Hansen, Nicolai
AU - Hedegård, Per
AU - Bjørnholm, Thomas
N1 - Funding Information:
Financial support from the European Union IST-FET `NANOMOL' program is gratefully acknowledged. The work at Arizona is supported by the Office of Naval Research, National Science Foundation, and the IBM Shared University Research Program. The work in Mons is supported by the Belgian Federal Government “InterUniversity Attraction Pole in Supramolecular Chemistry and Catalysis” and the Belgian National Fund for Scientific Research. J.C. is a research fellow of the FNRS. The Swedish Foundation of Strategic Research, SSF, and Research Council, VR, also supported the project. Fruitful discussions with Karsten Flensberg are greatly appreciated.
PY - 2004/8
Y1 - 2004/8
N2 - We report on a single electron transistor (SET) where the electronic levels of a single π-conjugated molecule control the electron transport properties. The molecule can be in several distinct charged states from +3 to -4. The experiment closely resembles electrochemical measurements allowing us to report on quantitative measurements of the redox potentials (or ionization potentials) of a single molecule in a solid state device. The molecular excitation energies extracted from the SET measurements are strongly correlated with electrochemical data. In contrast, the HOMO-LUMO gap is strongly reduced in a solid state environment, as compared to solution. We suggest that this surprising effect may be caused by image charges generated in the source and drain electrodes. They will result in a strong localization of the charges on the molecule.
AB - We report on a single electron transistor (SET) where the electronic levels of a single π-conjugated molecule control the electron transport properties. The molecule can be in several distinct charged states from +3 to -4. The experiment closely resembles electrochemical measurements allowing us to report on quantitative measurements of the redox potentials (or ionization potentials) of a single molecule in a solid state device. The molecular excitation energies extracted from the SET measurements are strongly correlated with electrochemical data. In contrast, the HOMO-LUMO gap is strongly reduced in a solid state environment, as compared to solution. We suggest that this surprising effect may be caused by image charges generated in the source and drain electrodes. They will result in a strong localization of the charges on the molecule.
KW - Image charges
KW - Molecular electronics
KW - Redox states
KW - Single electron tunneling
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U2 - 10.1016/j.cap.2004.01.018
DO - 10.1016/j.cap.2004.01.018
M3 - Article
AN - SCOPUS:3242754348
SN - 1567-1739
VL - 4
SP - 554
EP - 558
JO - Current Applied Physics
JF - Current Applied Physics
IS - 5
ER -