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ISRN Analytical Chemistry
Volume 2013 (2013), Article ID 637219, 7 pages
http://dx.doi.org/10.1155/2013/637219
Research Article

Electronic Structure of 2H-Tetraphenylporphyrin at Fe/Si (100) Interface

1Synchrotron S.c.p.A., SS-14 km, 163.5, in Area Science Park, Basovizza, 34149 Trieste, Italy
2International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
3Centre for Nonconventional Energy Resources, University of Rajasthan, Jaipur-04, India

Received 24 June 2013; Accepted 16 July 2013

Academic Editors: C. M. Chan and J. N. Latosinska

Copyright © 2013 Chhagan Lal and I. P. Jain. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Many recent studies have highlighted the possibility to tailor the physical and chemical properties of porphyrin at the molecular level to design novel catalysts, sensors and devices with applications in electronics, opto-electronics, and so forth. In the present work, we study the electronic properties of 2H-Tetraphenylporphyrin (2H-TPP) on iron (Fe) and iron silicide (Fe3Si) onto Si (100) substrate using X-ray and Ultraviolet photoelectron spectroscopy (XPS & UPS). The results revealed that the iron atom is coordinated by TPP molecules on Fe/Si as well as on Fe3Si/Si. XPS results provide evidence of the iron coordination with TPP molecules. The UPS analysis evidenced the fine structure in the electronic spectra related to HOMO states below the Fermi level.