Comparison Between Thermally Stimulated Discharge Method and Photo-stimulated Discharge Method for Measuring Space Charge Traps Energy
Comparison Between Thermally Stimulated Discharge Method and Photo-stimulated Discharge Method for Measuring Space Charge Traps Energy
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热刺激放电法与光刺激放电法测量空间电荷陷阱能量的比较
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Lei, Qingquan
中科院分区：
文献类型：
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作者：
Zhu, Zhien;Zhang, Yewen;An, Zhenlian;Zheng, Feihu;Lei, Qingquan
高压直流电作用下电介质的空间电荷行为受其电荷陷阱能量分布的影响，为此，分别采用热刺激放电（TSD）和光刺激放电（PSD）方法研究了几种典型聚合物材料中的电荷陷阱分布。实验结果表明，两种方法得到的陷阱能分布存在显著差异，但差异随聚合物熔点的升高而减小。这是由于聚合物中主链和支链运动的增加引起了TSD过程中陷阱中心环境的变化。PSD法是研究聚合物中电荷陷阱分布的一种较为准确的方法，尤其适用于低熔点聚合物。
The space charge behavior of a dielectric under HVDC is influenced by the charge trap energy distribution in it. Hence, we in- vestigated the charge trap distributions in several kinds of typical polymer materials using thermally stimulated discharge (TSD) and photo-stimulated discharge (PSD) methods, respectively. The experimental results show that,there is a significant difference between the trap energy distributions obtained by the two methods, but the difference decreases with the increase of the melting point of polymers. This is attributed to the change of the trap center environment during TSD caused by the increasing movements of both main chains and branched chains in polymers. PSD method is more accurate for investigating charge trap distribution in dielectrics, especially for polymers with low melting points.