Jose N Marat-Mendes 1, Rodica M Neagu 2 and Eugen R Neagu 1
1
Departamento de Ciências dos Materiais, CENIMAT, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
2
Physics Department, Technical University of Iasi, Romania
Journal of Physics D: Applied Physics Create an alert RSS this journal
Jose N Marat-Mendes et al 2004 J. Phys. D: Appl. Phys. 37 343
The electrical conduction in low-density polyethylene (LDPE) was investigated in the temperature range from 20°C to 95°C and for applied fields up to 12 MV m−1. The objective was to study the effects of the space charge (SC) accumulated in the material on the low and medium field quasi-steady-state conductivity in LDPE. Very long time (a week or longer) isothermal current measurements were carried out to focus on the situation when the SC effects are dominant. Complementary results were obtained using the isothermal discharge current, the final thermally stimulated discharge current and the isothermal final discharge current measurements. The results are explained by taking into account the constraint imposed by the trapped SC on charge injection, trapping and transport processes.
72.20.Jv Charge carriers: generation, recombination, lifetime, and trapping
72.20.Fr Low-field transport and mobility; piezoresistance
72.80.Le Polymers; organic compounds (including organic semiconductors)
Soft matter, liquids and polymers
Issue 3 (7 February 2004)
Received 15 April 2003
Published 14 January 2004
Jose N Marat-Mendes et al 2004 J. Phys. D: Appl. Phys. 37 343
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