Abstract
Surface and bulk conduction properties have been measured in low density polyethylene (LDPE), after 30 keV N+ and Ar+ ion bombardment, in the ion dose range of 1014-1016 ions/cm2. The surface resistivity of the films decreased by 9 orders of magnitude from its non-irradiated value of 1 × 1017 Ω/□ to 2 × 108 Ω/□ at a dose of 1016 ions/cm2. Temperature dependence of surface conductivity was consistent with the charge transport due to hopping between conducting particles, as proposed by Sheng et al. The bulk conductivity increases with increasing the dose, and considerable asymmetry in the current-voltage (I-V) characteristics appears at an ion dose of 1016 ions/cm2. The rectifying ratio is 4 orders of magnitude. The behavior of the bulk conduction was dominated by space charge limited current.
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