Size effect of nanometer vacuum gap thermionic power conversion device with CsI coated graphite electrodes

Cesium iodide (CsI) coated graphite is a good candidate for an electrode material of a thermionic power generation device due to its low work function. In this letter, a thermionic device with a nanometer-scale vacuum gap between a CsI coated graphite emitter and a collector will be investigated whi...

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Bibliographic Details
Published in:Applied physics letters 2009-11, Vol.95 (22), p.223107-223107-3
Main Authors: Lee, Jeong Ik, Jeong, Yong Hoon, No, Hee-Cheon, Hannebauer, Rob, Yoo, Sang-Keun
Format: Article
Language:English
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Summary:Cesium iodide (CsI) coated graphite is a good candidate for an electrode material of a thermionic power generation device due to its low work function. In this letter, a thermionic device with a nanometer-scale vacuum gap between a CsI coated graphite emitter and a collector will be investigated while considering various gap-size effects. It is shown that a nanometer scale gap-size not only affects electron transport but also photon transport, and that all of these effects must be taken into account when estimating the device's performance.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3266921