Nanostructured electrodes for thermionic and thermotunnel devices

1401 10 5636 2 15668 document 5636 Nanostructured electrodes for thermionic and thermotunnel devices.pdf application/pdf aec04cef911b999dc1dd442b1c2df7c4 MD5 340988 2014-05-03 07:31:31 http://eprints.iliauni.edu.ge/1401/1/Nanostructured%20electrodes%20for%20thermionic%20and%20thermotunnel%20devices.pdf 1401 1 1 application/pdf text en validuser

Nanostructured electrodes for thermionic and thermotunnel devices.pdf

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http://eprints.org/relation/isVersionOf http://eprints.iliauni.edu.ge/id/document/8245 http://eprints.org/relation/isVolatileVersionOf http://eprints.iliauni.edu.ge/id/document/8245 http://eprints.org/relation/issmallThumbnailVersionOf http://eprints.iliauni.edu.ge/id/document/8245 archive 15 disk0/00/00/14/01 2014-05-05 12:53:18 2015-04-02 08:28:27 2014-05-05 12:53:18 article show avtandil.tavkhelidze@iliauni.edu.ge Tavkhelidze A. avtandil.tavkhelidze@iliauni.edu.ge Nanostructured electrodes for thermionic and thermotunnel devices pub T1 fac_eng restricted Recently, distinctive quantum features have been studied in the area of ridged quantum wells (RQWs). Periodic ridges on the surface of the quantum well layer impose additional boundary conditions on the electron wave function and reduce the quantum state density. Electrons, rejected from forbidden quantum states, have to occupy the states with higher energy. As a result, Fermi energy in RQW increases and work function (WF) decreases. We investigate low WF electrode, composed from a metal RQW layer and a base substrate. The substrate material was selected so that electrons were confined to the RQW. The WF value depends on ridge geometry and electron confinement. We calculate WF in the metal RQW filmsgrown both on a semiconductor and metal substrates. In the case of semiconductor substrate, wide band gap materials are preferable as they allow more reduction in RQW WF. In the case of metal substrate, low Fermi energy materials are preferable. For most material pairs, the WF was reduced dramatically. Such structures, can serve as electrodes for room temperature thermionic and thermotunnel energy converters and coolers. 2010 J. Appl. Phys. 108 4 AIP Publishing 044313 TRUE http://dx.doi.org/10.1063/1.3464256