The mobility of positive and negative charge carriers has been separately measured independently of carrier concentration in low-density polyethylene (LDPE) and its nanocomposites using space charge measurements in a bilayer system. It was found that the carrier mobility of positive charge carriers was larger than that of negative charge carriers for both LDPE and its nanocomposites and that the carrier mobility was one to two orders of magnitude less in the nanocomposite than unfilled LDPE under the same conditions. The mobility is interpreted in terms of a field-assisted hopping model whose estimated activation energies were verified by measurements at different temperatures. The form of the charge traps and carrier transport is interpreted in terms of known features and electron and hole traps and the effect of nano-particles upon these features is discussed.

中文翻译：

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低密度聚乙烯及其纳米复合材料中的载流子传输

使用双层系统中的空间电荷测量，正负电荷载流子的迁移率独立于低密度聚乙烯 (LDPE) 及其纳米复合材料中的载流子浓度单独测量。发现对于 LDPE 及其纳米复合材料，正电荷载流子的载流子迁移率大于负电荷载流子的迁移率，并且在相同条件下，纳米复合材料中的载流子迁移率比未填充的 LDPE 低一到两个数量级。迁移率是根据场辅助跳跃模型来解释的，该模型的估计激活能通过在不同温度下的测量来验证。