Author(s): Campos, M. ; Cavalcante, E. M. [UNESP] ; Kalinowski, J.
Date: 2022
Persistent ID: http://hdl.handle.net/11449/219191
Origin: Oasisbr
Subject(s): Electrical conductivity of poly(p-phenylene sulfide); Poly(p-phenylene sulfide); Poole-Frenkel effect
Made available in DSpace on 2022-04-28T18:54:09Z (GMT). No. of bitstreams: 0 Previous issue date: 1996-01-01
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 103-106 V/cm exhibits exp βU1/2 behavior with β = βSchottky below the glass transition temperature (Tg ≅ 90°C), and β = βPoole-Frenkel above Tg. Coordinated temperature measurements of dc currents with different metallic contacts and thermally stimulated currents (TSC) indicate, however, that the conductivity at T < Tg 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. © 1996 John Wiley & Sons, Inc.
Inst. de Fis. e Quim. de S. Carlos Universidade de São Paulo, São Carlos, SP-13.560-970
Departamento de Ciencias Faculdade de Engenharia UNESP, Ilha Solteira, SP-15378
Ist. Fotochimica Radiazioni d'A. C.N.R. Bologna, I-40129 Bologna
Istituto FRAE del CNR, 40129 Bologna
Department of Molecular Physics Tech. University of Gdańsk, 80-952 Gdańsk
Departamento de Ciencias Faculdade de Engenharia UNESP, Ilha Solteira, SP-15378
