Thermoelectricity in Molecular Junctions
Lawrence Berkeley National Laboratory · University of California, Berkeley
Abstract
By trapping molecules between two gold electrodes with a temperature difference across them, the junction Seebeck coefficients of 1,4-benzenedithiol (BDT), 4,4'-dibenzenedithiol, and 4,4''-tribenzenedithiol in contact with gold were measured at room temperature to be +8.7 +/- 2.1 microvolts per kelvin (muV/K), +12.9 +/- 2.2 muV/K, and +14.2 +/- 3.2 muV/K, respectively (where the error is the full width half maximum of the statistical distributions). The positive sign unambiguously indicates p-type (hole) conduction in these heterojunctions, whereas the Au Fermi level position for Au-BDT-Au junctions was identified to be 1.2 eV above the highest occupied molecular orbital level of BDT. The ability to study…
Citation impact
- FWCI
- 34.48
- Percentile
- 100%
- References
- 28
Authors
4- PRPramod ReddyCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
- SJSung‐Yeon JangCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
- RARachel A. SegalmanCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
- AMArun MajumdarCorresponding
Lawrence Berkeley National Laboratory, University of California, Berkeley
Topics & keywords
- Seebeck coefficient
- Thermoelectric effect
- Heterojunction
- Thermal conduction
- Condensed matter physics
- HOMO/LUMO
- Molecular orbital
- Fermi level
- Affordable and clean energy