Publicação: Poole-Frenkel effect in amorphous poly(p-phenylene sulfide)
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Wiley-Blackwell
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The conductivity of poly(p-phenylene sulfide) (PPS) amorphous samples sandwiched between metallic electrodes has been studied as a function of applied voltage, temperature, and electrode material. The voltage (U) dependence of the currents for electric fields within the range 10(3)-10(6) V/cm exhibits exp beta U-1/2 behavior with beta = beta(Schottky) below the glass transition temperature (T-g congruent to 90 degrees C), and beta = beta(Poole-Frenkel) above T-g. Coordinated temperature measurements of de currents with different metallic contacts and thermally stimulated currents (TSC) indicate, however, that the conductivity at T < T-g is consistent with the so-called ''anomalous'' Poole-Frenkel effect rather than the Schottky effect. Consequently, the p-type conductivity in amorphous PPS is proposed to be a bulk-limited process due to ionization of two different types of acceptor centers in the presence of neutral hole traps. (C) 1996 John Wiley & Sons, Inc.
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poly(p-phenylene sulfide), electrical conductivity of poly(p-phenylene sulfide), Poole-Frenkel effect
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Inglês
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Journal of Polymer Science Part B-polymer Physics. New York: John Wiley & Sons Inc., v. 34, n. 4, p. 623-629, 1996.
