Title :
A novel method for distribution of trap levels in dielectric by photo-stimulated discharge
Author :
Zhu, Zhien ; Zhang, Yewen ; An, Zhenlian ; Zheng, Feihu
Author_Institution :
Shanghai Key Lab. of Special Artificial Microstructure Mater. & Technol., Tongji Univ., Shanghai, China
Abstract :
The distribution of trap levels in the LLDPE (linear low density polyethylene) is studied by means of photo-stimulated discharge (PSD). And two scanning manners, continuous scanning and step scanning, are discussed. It is pointed out that there may be some problems because of the incomplete detrapping of the trapping charges for the continuous scanning. The principle and the experimental process for the step scanning were presented. It is found that there is linear relationship between the logarithm of PSD current produced under the irradiation of the monochromatic light and the time. It accords with the theoretical analysis and demonstrates that the retrapping effect of the carriers can be neglected. The charges were in the levels of 4.36-6.22 eV, and the majority of which were trapped in the energy levels around 4.97 eV in LLDPE.
Keywords :
discharges (electric); energy states; polyethylene insulation; continuous scanning; energy level; linear low density polyethylene; monochromatic light; photostimulated discharge; trapping charge; Discharges; Energy states; Equations; Photoconductivity; Photonics; Plastics; Radiation effects; decay current; distribution of trap levels; photo-stimulated discharge;
Conference_Titel :
Solid Dielectrics (ICSD), 2010 10th IEEE International Conference on
Conference_Location :
Potsdam
Print_ISBN :
978-1-4244-7945-0
Electronic_ISBN :
978-1-4244-7943-6
DOI :
10.1109/ICSD.2010.5568035
