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OPTICAL AND ELECTRICAL PROPERTIES OF DOPED POLY-3-OCTYLTHIOPHENE FILMS
Citation:
Lidberg, R., K. Goswami, M. Lovato, R. Venkatasubramanian, AND W. Engelmann. OPTICAL AND ELECTRICAL PROPERTIES OF DOPED POLY-3-OCTYLTHIOPHENE FILMS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-95/046 (NTIS PB95199683), 1995.
Description:
Results of optical absorption and electrical conductivity measurements of solution-doped poly-3-octylthiophene (P3OT) films were studied. hloroform solutions of P3OT were doped with the organic electron-acceptors, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and 7,7,8,8-tetracyanoquinodimethane; and with the inorganic electron acceptor, ferric chloride. harge transfer was observed in P3OT solutions doped with FeCl3 and DDQ. CNQ-doped solutions showed no optical evidence of charge transfer. hin films of doped P3OT were examined at various doping levels. pectroscopic and electrical conductivity measurements of P3OT films, doped with DDQ, TCNQ, and FeCl3 at different doping levels, are presented. ptical absorption measurements provided information on the degree of charge transfer occurring for the various dopants. lectrical conductivity measurements showed that the conductivity of P3OT increased with the various dopants in the order of TCNQ < DDQ < FeCl3, for the same dopant level. esults are discussed in relation to the electrochemical properties of the prepared films. sefulness lies in the ability to design and tailor new chemical sensor films which are responsive to various analytes of interest and importance to the U.S. EPA, based on the analytes electrochemical characteristics.
