Numerical Analysis of Space Charge Electric Field and Its Effect on TSDC Measurement in Thin Polymer Films
The internal electric field and potential in thin polymer film caused by injected charges were numerically analyzed and some paradoxical TSDC experimental results and the effect of internal electric field on the trap parameters obtained from TSDC measurement were discussed. Its found that, under short-circuit of the external electrodes, one zero electrical field plane and one potential peak appeared within the film and their positions depended on the spatial distribution of the space charges. The internal electric filed can vary from -3×107V/m to 5×107V/m in the case of a space charge density 100C/m3 at the interface between cathode and polymer film. The large internal electric field has an important impact on the space charge transportation due to Poole-Frenkel effect, which can change the trap depth. In addition, the reversed current peak in TSDC spectrum, the reduced space charge quantity that can be measured by TSDC may all be resulted from the internal electric field and potential distribution.
space charge internal electric field internal electric potential transportation thermally stimulated current
Wenbin BU Jinghua YIN Fuqiang TIAN Qingquan LEI
Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, School of Appli Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, School of Appli School of Electrical Engineering, Beijing Jiaotong University, Beijing, 100044 CHINA Key Laboratory College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbi
国际会议
哈尔滨
英文
938-941
2009-07-19（万方平台首次上网日期，不代表论文的发表时间）