High resolution synchrotron radiation PES study of PbPc deposited on Pt(111)

We studied lead phthalocyanine (PbPc) films sublimated under UHV conditions on a clean Pt(111) substrate. We report results from high resolution photo electron spectra of the Pb 5d, Ph 4f, C 1s, N 1s and Pt 4f core level using synchrotron radiation. Comparison between ultra thin films and thicker fil ms shows that the first molecular adlayer interacts strongly with the subst rate and we report evidence of Pb-Pt alloy formation on the surface. For th e thick films, the C Is and N Is core level spectra show usual characterist ics, however in the case of ultra thin films, we note important differences with respect to some previous results. (C) 2000 Elsevier Science B,V. All rights reserved.