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Charge Injection and Dielectric Characteristics of Polyethylene Terephthalate Based on Semiconductor Electrodes

机译：基于半导体电极的聚乙烯对苯二甲酸乙二醇酯的电荷喷射和介电特性

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摘要

Employing a novel semiconductor electrode in comparison with the traditional semiconductor electrode made of polyethylene/ethylene-vinyl-acetate copolymer/carbon-black (PE/EVA/CB) composite, characteristic charge carriers are injected into polyethylene terephthalate (PET) as a polymer dielectric paradigm, which will be captured by specific deep traps of electrons and holes. Combined with thermal stimulation current (TSC) experiments and first-principles electronic-state calculations, the injected charges from the novel electrode are characterized, and the corresponding dielectric behavior is elucidated through DC conductance, electrical breakdown and dielectric spectrum tests. TSC experiments with novel and traditional semiconductor electrodes can distinguish the trapping characteristics between hole and electron traps in polymer dielectrics. The observable discrepancy in space charge-limited conductance and the stable dielectric breakdown strength demonstrate that the electron injection into PET film specimen is restricted by using the novel semiconductor electrode. Attributed to the favorable suppression on the inevitable electron injections from metal electrodes, adopting novel i-electrode can avoid the evident abatement of dipole orientation polarization caused by space charge clamp, but will engender the accessional high-frequency dielectric loss from dielectric relaxations of interface charges at i-electrodes.
机译：与具有聚乙烯/乙烯 - 乙酸乙烯酯共聚物/碳黑（PE / EVA / CB）复合材料制成的传统半导体电极相比，使用新的半导体电极，将特征电荷载流子注入聚对苯二甲酸乙二醇酯（PET）中作为聚合物电介质范例将被电子和孔的特定深疏水阀捕获。结合热刺激电流（TSC）实验和第一原理电子状态计算，从新电极的注入电荷的特征在于，并且通过直流电导，电击和介电谱测试阐明了相应的电介质行为。具有新颖和传统的半导体电极的TSC实验可以区分孔和电子阱之间的捕获特性在聚合物电介质中。空间电荷限制的可观察到的差异和稳定的介电击穿强度证明了通过使用新颖的半导体电极限制了对PET膜样品的电子注入。归因于对来自金属电极的不可避免的电子注入的有利抑制，采用新型I电极可以避免由空间电荷钳位引起的偶极子取向极化的明显削减，而是将从界面电荷的介电弛豫中引导辅助高频介电损耗在I电极。

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