Synthesis and characterization of low work ...
Type de document :
Compte-rendu et recension critique d'ouvrage
DOI :
Titre :
Synthesis and characterization of low work function alkali oxide thin films for unconventional thermionic energy converters
Auteur(s) :
Giorgis, Valentina [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Morini, François [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Zhu, Tianqi [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Robillard, Jean-François [Auteur]
Microélectronique Silicium - IEMN [MICROELEC SI - IEMN]
Wallart, Xavier [Auteur]
EPItaxie et PHYsique des hétérostructures - IEMN [EPIPHY - IEMN]
Codron, Jean-Louis [Auteur]
Centrale de Micro Nano Fabrication - IEMN [CMNF - IEMN]
DUBOIS, Emmanuel [Auteur]
Microélectronique Silicium - IEMN [MICROELEC SI - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Morini, François [Auteur]
GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) [GREMAN - UMR 7347]
Zhu, Tianqi [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Robillard, Jean-François [Auteur]
Microélectronique Silicium - IEMN [MICROELEC SI - IEMN]
Wallart, Xavier [Auteur]
EPItaxie et PHYsique des hétérostructures - IEMN [EPIPHY - IEMN]
Codron, Jean-Louis [Auteur]
Centrale de Micro Nano Fabrication - IEMN [CMNF - IEMN]
DUBOIS, Emmanuel [Auteur]
Microélectronique Silicium - IEMN [MICROELEC SI - IEMN]
Titre de la revue :
Journal of Applied Physics
Pagination :
205108
Éditeur :
American Institute of Physics
Date de publication :
2016
ISSN :
0021-8979
Discipline(s) HAL :
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Résumé en anglais : [en]
In this work, we present the synthesis and the characterization of low work function thin films for Micro Thermionic Converters (MTC). The objective is producing a device operating at relatively low temperature (< 1000 K). ...
Lire la suite >In this work, we present the synthesis and the characterization of low work function thin films for Micro Thermionic Converters (MTC). The objective is producing a device operating at relatively low temperature (< 1000 K). We aim at improving the MTC efficiency by reducing the work function of the electrodes and increasing the emitted current density by alkali metal oxides electrodes coating. In particular, in this work, we analyse and compare the performances of two alkali metal oxides: potassium and caesium oxides. Our choice to exploit those materials relies on their low work function and their abundance. For both materials, we present the results on the synthesis of the oxides under high vacuum and controlled temperature. The oxide thin films were characterized by X-ray photoelectron spectroscopy, photoemission, and thermionic emission measurements. By exploiting the latter technique, a quantitative evaluation of the current density, emitted by the heated oxides, is obtained as a function of temperature. Our results demonstrate that it is possible to decrease the silicon work function by almost 3 eV, enabling significant thermionic currents despite relatively low temperatures (below 850 K). Published by AIP Publishing.Lire moins >
Lire la suite >In this work, we present the synthesis and the characterization of low work function thin films for Micro Thermionic Converters (MTC). The objective is producing a device operating at relatively low temperature (< 1000 K). We aim at improving the MTC efficiency by reducing the work function of the electrodes and increasing the emitted current density by alkali metal oxides electrodes coating. In particular, in this work, we analyse and compare the performances of two alkali metal oxides: potassium and caesium oxides. Our choice to exploit those materials relies on their low work function and their abundance. For both materials, we present the results on the synthesis of the oxides under high vacuum and controlled temperature. The oxide thin films were characterized by X-ray photoelectron spectroscopy, photoemission, and thermionic emission measurements. By exploiting the latter technique, a quantitative evaluation of the current density, emitted by the heated oxides, is obtained as a function of temperature. Our results demonstrate that it is possible to decrease the silicon work function by almost 3 eV, enabling significant thermionic currents despite relatively low temperatures (below 850 K). Published by AIP Publishing.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Projet Européen :
Source :
Fichiers
- https://hal.archives-ouvertes.fr/hal-03276235/document
- Accès libre
- Accéder au document
- https://hal.archives-ouvertes.fr/hal-03276235/document
- Accès libre
- Accéder au document
- document
- Accès libre
- Accéder au document
- 2016-Giorgis-JAP-Synthesis-Characterization-Low-Workfunction-Alkali-Oxide.pdf
- Accès libre
- Accéder au document