The Au/P3MT/AI sandwich structure has been studied by AES and XPS as well as I-V and C-V analyses. It is shown by experimental results that the properties of a conducting polymer are obviously different from that of conventional semiconductors. The characteristics of the conducting polymer/ metal interface are remarkably dependent on the work functions of the materials. The density distribution of ionized dopants at the surface of a conducting polymer will change as it makes contact with a metal. The time constant of transient characteristics of conducting polymerlmetal contacts is much longer than that of conventional semiconductor/metal contacts.
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