Three-dimensional analysis of the geometrical rectifying properties of asymmetric metal-vacuum-metal junctions and extension for energy conversion

A. Mayer, M. S. Chung, Brock Landon Weiss, N. M. Miskovsky, P. H. Cutler

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We study the rectification properties of geometrically asymmetric metal-vacuum-metal junctions. In particular, we focus on systems in which the cathode metal supports a hemispherical protrusion. By using a transfer-matrix methodology to take account of three-dimensional aspects of the problem, we compute the forward and backward currents that flow in this device when it is subject to positive or negative external biases. These currents enable the calculation of the rectification properties of the device in the limit of quasistatic fields. We also determine the power this device could provide to an external load. We study in detail how these properties depend (i) on the magnitude of the bias established between the two metallic electrodes, (ii) on the separation between the two electrodes, (iii) on differences in the work function of the two metals, (iv) on differences in the temperature of the two metals, and (v) on the height of the protrusion. These calculations provide quantitative results for the use of these junctions as an energy converter and the efficiency with which the energy of incident radiation is being converted into a dc current and delivered to an external load.

Original languageEnglish (US)
Article number085411
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number8
DOIs
StatePublished - Feb 8 2008

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dimensional analysis
energy conversion
Energy conversion
Metals
Vacuum
vacuum
metals
rectification
direct power generators
Electrodes
electrodes
incident radiation
Cathodes
cathodes
methodology
Radiation
Temperature
temperature
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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Three-dimensional analysis of the geometrical rectifying properties of asymmetric metal-vacuum-metal junctions and extension for energy conversion. / Mayer, A.; Chung, M. S.; Weiss, Brock Landon; Miskovsky, N. M.; Cutler, P. H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 8, 085411, 08.02.2008.

Research output: Contribution to journalArticle

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