ENERGY-LEVEL BENDING AND ALIGNMENT AT THE INTERFACE BETWEEN CA AND A PHENYLENE VINYLENE OLIGOMER

We have studied the interface formation of a vinylene phenylene oligom er with a Ca substrate using photoemission spectroscopy. The evolution of core and valence spectra during the deposition of the oligomer on Ca has indicated the molecular energy level bending. The total energy level bending was 0.5 eV and the thickness of the level bending region was about 100 Angstrom. We propose an energy level diagram of the oli gomer-Ca interface based on the information obtained from the photoemi ssion spectra. (C) 1996 American Institute of Physics.