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Thermionic current densities from first principles
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DOI：10.1063/1.4805002.png)
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摘要
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We present a density functional theory-based method for calculating thermionic emission currents from a cathode into vacuum using a non-equilibrium Green's function approach. It does not require semi-classical approximations or crude simplifications of the electronic structure used in previous methods and thus provides quantitative predictions of thermionic emission for adsorbate-coated surfaces. The obtained results match well with experimental measurements of temperature-dependent current densities. Our approach can thus enable computational design of composite electrode materials. (C) 2013 AIP Publishing LLC.
Keyword:
FIELD-EMISSION CURRENTS
WORK-FUNCTIONS
TUNGSTEN
期刊
IF:
3.1
论文数:
7.2W
被引数:
23.2W
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