Title :
Study on charge trap distribution in LLDPE by photo-stimulated discharge current
Author :
Zhu, Zhien ; Zhang, Yewen ; An, Zhenlian ; Zheng, Feihu
Author_Institution :
Pohl Inst. of Solid State Phys., Tongji Univ., Shanghai, China
Abstract :
The method of the photo-stimulated discharge current (PSDC) for measuring trap energy levels in dielectrics has received considerable attention in the recent past. It is the optical equivalent of TSDC but much more powerful than TSDC. In this paper, the films of LLDPE are charged either with DC high voltage or in a point-to-plane corona discharge. The experimental results show the relationship between the photo-stimulated current and the wavelength while the films are irradiated under the UV-light which scan from 400-200 nm in 1000 seconds. From the results of PSDC, it shows the difference between two charging methods and the contribution of external photoeffect. The measuring for distribution of the trap levels by PSDC makes it a role for the future investigation of electrical aging and so on in polymer dielectrics.
Keywords :
corona; dielectric materials; polymer films; ultraviolet radiation effects; UV-light; charge trap distribution; charging methods; electrical aging; external photoeffect; photo-stimulated discharge current; point-to-plane corona discharge; polymer dielectrics; size 400 nm to 200 nm; time 1000 s; trap energy levels; Aging; Corona; Current measurement; Dielectric measurements; Electric variables measurement; Energy measurement; Energy states; Optical films; Voltage; Wavelength measurement; LLDPE; PSDC charge; trap levels;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252249
