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Title
Proceedings of the International Conference on Science and Technology of Synthetic Metals The chemical and electronic structure of the interface between aluminum and conjugated polymers or molecules
Article in journal
Authors
Per Dannetun, Michael Lögdlund, Mats Fahlman, Magnus Boman, Sven Stafström, William R. Salaneck, R. Lazzaroni, C. Fredriksson, J. L. Brédas, S. Graham, R. H. Friend, A. B. Holmes, R. Zamboni, C. Taliani
Publication Year
1993
Source
Synthetic metals, 1993, (55)1, 212-217
Link to Source (DOI)
10.1016/0379-6779(93)90935-P
Abstract
<p>The interaction between aluminum and α-ω-diphenyltetradecaheptaenee (DP7), α-sexithienyl (6T), and poly(p-phenylenevinylene) (PPV), respectively have been studied using both X-ray Photoelectron Spectroscopy (XPS) and Ultraviolet Photoelectron Spectroscopy (UPS). The UPS valence band spectra, are interpreted with the help of quantum chemical calculations based upon Modified Neglect of Diatomic Overlap (MNDO), Valence Effective Hamitonian (VEH) and ab initio Hartree-Fock methods. DP7 is a model molecule for polyacetylene, while 6T is a model molecule (an oligomer) of polythiophene. The results indicate that aluminum reacts strongly with the surfaces of all of the materials studied. The π-electronic structure of each material was strongly modified. Furthermore, aluminum reacts preferentially with the polyene partof DP7, with the vinylene part of PPV, and with the α-carbons of the thiophene nits of 6T.</p>