Abstract
The effect of vapour deposited metal (nickel and gold) on poly(p-phenylene-vinylene) (PPV) is investigated using X-ray photoelectron spectroscopy (XPS). Upon metallization, changes in the carbon and metal spectra are observed in comparison to the those recorded in the pristine ones, perhaps indicating an interaction at the polymer-metal interface. By comparison with earlier works, the formation of metal carbide in the polymer is postulated. The presence of such interactions appears to affect the behaviour of such metals when used as electrical contacts on a PPV substrate, as found from an I/V study of the characteristics of Cr-PPV-Au and Cr-PPV-Ni diodes.
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