Ultraviolet photoelectron spectroscopy (UPS) has been used to determine the highest occupied molecular orbital (HOMO) energy levels of a series of related 2,2′-bipyridyl-substituted ruthenium dyes utilized in th
Ultraviolet photoelectron spectroscopy (UPS), while less commonly used than X-ray photoelectron spectroscopy (XPS), has important applications in chemistry, physics, and materials science. Similar to XPS, photons irradiate a sample of interest and cause photoelectron ejection; however, deep ultraviolet ...
UltravioletPhotoelectronSpectroscopy(UPS)UVlight(hn=5to100eV)toexcitephotoelectron.Fromananalysisofthekineticenergyandangulardistributionofthephotoelectrons,informationontheelectronicstructure(bandstructure)ofthematerialunderinvestigationcanbeextractedwithsurfacesensitivity.CandeterminedensityofStatesD(Ei)(occupied)Angular...
Ultraviolet Photoelectron Spectroscopy (UPS) UV light ( hn = 5 to 100 eV) to excite photoelectron. From an analysis of the kinetic energy and ..
UPS is a photoelectron spectroscopy technique using photons in the ultraviolet region (typically from 10 to 150 eV) as an excitation source. The technique is used to study valence electronic structures of solid surfaces, molecular orbital energies of adsorbed species and work functions of the ...
Compared with X-ray photoelectron spectroscopy (XPS) or Auger electron spectroscopy (AES), ultraviolet photoelectron spectroscopy (UPS) is not generally considered to be an analytic technique for the surface characterization of materials. It is, however, an extremely surface sensitive technique where eve...
‘tail’ at the low kinetic energy end of the spectrum (a.k.a. spectrum width) and subtracting this value from the incident photon energy. This value can of course be measured using X-ray incident radiation; however, ultraviolet photoelectron spectroscopy allows work function calculation from a...
Ultraviolet photoelectron spectroscopy also exhibits greater surface sensitivity than XPS, the inherent surface sensitivity of XPS is due to the short inelastic mean free path (IMFP, or λ) of free electrons within a solid, with the so-called “information depth” from which > 99% of...
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Ultraviolet photoelectron spectroscopy (UPS) is a common method to characterize the electrical properties of the 2D semiconductor films, it was carried out in an ultra-high vacuum system supplied within the light resource of specs microwave ultraviolet (HeI = 21.2 eV; UV spot diameter is ...