Energy level alignment at metal-octaethylporphyrin interfaces

Alkauskas, A. and Ramoino, L. and Schintke, S. and von Arx, M. and Baratoff, A. and Guntherodt, H. -J. and Jung, T. A.. (2005) Energy level alignment at metal-octaethylporphyrin interfaces. Journal of Physical Chemistry B, 109 (49). pp. 23558-23563.

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We studied the electronic structure of copper-octaethylporphyrin (CuEOP) adsorbed on three metal surfaces - Ag(001), Ag(111), and Cu(111)-by means of ultraviolet photoelectron spectroscopy (UPS). The adsorption-induced work function shifts saturate roughly beyond two monolayers. The saturation values are substrate dependent, negative, and range from -1.30 to -0.85 eV. This shift is larger than that for tetraphenylporphyrins. The two highest occupied molecular orbitals (HOMO and HOMO-1) of the organic are clearly resolved in the UPS spectra. The origin of the negative work function shift is discussed.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik
UniBasel Contributors:Jung, Thomas A.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:24 May 2023 09:24
Deposited On:24 May 2023 09:24

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