CHARGE TRANSPORT AT CONJUGATED POLYMER–INORGANIC SEMICONDUCTOR AND CONJUGATED POLYMER–METAL INTERFACES

Charge transport at conjugated polymer interfaces with metals and inorganic semiconductors is reviewed. Experiments on the equilibrium properties and DC current-voltage behavior of four specific classes of interfaces—metal–doped conjugated polymer, inorganic semiconductor–doped conjugated polymer, metal–intrinsic conjugated polymer, and metal–intrinsic conjugated polymer/electrolyte—are discussed. To facilitate this discussion, classic models of equilibration at ideal interfaces between electronic conductors and free-electron transport are introduced and their limitations discussed. Particular emphasis is placed on the charge distributions and interfacial potential profiles expected at various types of electroactive interfaces.