Examination of C12A7 electride work function and surface composition by means of XPS, UPS and thermionic emission measurements
Résumé
The work functions of LaB6 and C12A7:e-samples have been estimated by thermionic emission measurements and compared with ultraviolet photoelectron spectroscopy (UPS) data. In addition to this, the surface composition of the samples is characterized by X-ray photoelectron spectroscopy (XPS). Consistent work function values of 3.2-3.3 eV have been measured for clean LaB6 samples. A wider range of values has been measured with the C12A7:e-sample, where a work function of 2.4-2.8 eV and 3.2 eV is estimated when using a setup for thermionic emission and UPS, respectively.
Domaines
Sciences de l'ingénieur [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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