Spatially resolved, substrate-induced rectification in C60 bilayers on copper
Abstract
Here, we demonstrate rectification ratios (RR) of ≳1000 at biases of 1.3 V in bilayers of C60 deposited on copper. Using scanning tunneling spectroscopy and first-principles calculations, we show that the strong coupling between C60 and the Cu(111) surface leads to the metallization of the bottom C60 layer, while the molecular orbitals of the top C60 are essentially unaffected. Due to this substrate-induced symmetry breaking and to a tunneling transport mechanism, the system behaves as a hole-blocking layer, with a spatial dependence of the onset voltage on intra-layer coordination. Together with previous observations of strong electron-blocking character of pentacene/C60 bilayers on Cu(111), this work further demonstrates the potential of strongly hybridized, C60-coated electrodes to harness the electrical functionality of molecular components.
- Authors:
-
- Univ. of Central Lancashire, Preston (United Kingdom)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1371915
- Alternate Identifier(s):
- OSTI ID: 1349344
- Grant/Contract Number:
- AC02-06CH11357; FG02-09ER16109
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 146; Journal Issue: 9; Journal ID: ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; scanning tunneling spectroscopy; Schottky; density functional theory; fullerene; rectification
Citation Formats
Smerdon, J. A., Darancet, P., and Guest, J. R. Spatially resolved, substrate-induced rectification in C60 bilayers on copper. United States: N. p., 2017.
Web. doi:10.1063/1.4975795.
Smerdon, J. A., Darancet, P., & Guest, J. R. Spatially resolved, substrate-induced rectification in C60 bilayers on copper. United States. https://doi.org/10.1063/1.4975795
Smerdon, J. A., Darancet, P., and Guest, J. R. Wed .
"Spatially resolved, substrate-induced rectification in C60 bilayers on copper". United States. https://doi.org/10.1063/1.4975795. https://www.osti.gov/servlets/purl/1371915.
@article{osti_1371915,
title = {Spatially resolved, substrate-induced rectification in C60 bilayers on copper},
author = {Smerdon, J. A. and Darancet, P. and Guest, J. R.},
abstractNote = {Here, we demonstrate rectification ratios (RR) of ≳1000 at biases of 1.3 V in bilayers of C60 deposited on copper. Using scanning tunneling spectroscopy and first-principles calculations, we show that the strong coupling between C60 and the Cu(111) surface leads to the metallization of the bottom C60 layer, while the molecular orbitals of the top C60 are essentially unaffected. Due to this substrate-induced symmetry breaking and to a tunneling transport mechanism, the system behaves as a hole-blocking layer, with a spatial dependence of the onset voltage on intra-layer coordination. Together with previous observations of strong electron-blocking character of pentacene/C60 bilayers on Cu(111), this work further demonstrates the potential of strongly hybridized, C60-coated electrodes to harness the electrical functionality of molecular components.},
doi = {10.1063/1.4975795},
journal = {Journal of Chemical Physics},
number = 9,
volume = 146,
place = {United States},
year = {Wed Feb 22 00:00:00 EST 2017},
month = {Wed Feb 22 00:00:00 EST 2017}
}
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Works referencing / citing this record:
Preface: Special Topic on Frontiers in Molecular Scale Electronics
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- The Journal of Chemical Physics, Vol. 146, Issue 9
Preface: Special Topic on Frontiers in Molecular Scale Electronics
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- Universität Regensburg