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Analysis and interpretation of photo-stimulated discharge spectrum for polypropylene films under different electric and geometrical conditions
Affiliation:1. Department of Electrical Engineering, Tongji University, Shanghai 201804, China;2. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Department of Physics, Tongji University, Shanghai 200092, China;3. Laboratoire de Physique et d''Étude des Matériaux (LPEM, UMR 8213), CNRS, Sorbonne Universités, UPMC Univ Paris 06, PSL Research University, ESPCI-ParisTech, Paris 75005, France;1. Institute of Thermal Science and Power Engineering, Naval University of Engineering, Wuhan 430033, PR China;2. Military Key Laboratory for Naval Ship Power Engineering, Naval University of Engineering, Wuhan 430033, PR China;3. College of Power Engineering, Naval University of Engineering, Wuhan 430033, PR China;1. Graduate Institute of Teaching Chinese as a Second/Foreign Language at National Kaohsiung Normal University, 116, Heping 1st Rd., Lingya District, Kaohsiung 802, Taiwan, ROC;2. Department of Chinese as a Second Language at National Taiwan Normal University, 162, Section 1, Heping East Rd., Taipei 10610, Taiwan, ROC;3. Taiwan Shofu University, 168, Nanshi Li, Madou Dist., Tainan, Taiwan, ROC;4. Department of English at National Kaohsiung Normal University, Taiwan, ROC;5. Zhong-shan Senior High School, 2, Zhengfeng St., Sanmin District, Kaohsiung 807, Taiwan, ROC;1. Department of Physics, Jaypee University, Anoopshahr 203390, India;2. Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076, India;1. School of Physical Science and Technology, Lanzhou University, Lanzhou, China;2. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China;1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA;2. Department of Materials Science and Engineering and Optoelectronic Convergence Research Center, Chonnam National University, Gwangju 500-757, South Korea;3. Department of Chemistry Education and Optoelectronic Convergence Research Center, Chonnam National, University, Gwangju 500-757, South Korea
Abstract:Experiments on polypropylene films under different electric and geometrical conditions are carried out to investigate various causes that would affect the interpretation of photo-stimulated discharge spectrum. The samples used in the experiment are metalized with finger-like shape or circular shape electrodes. The results show that the occurrence of photoemissions from electrode or polymer at wavelengths less than about 260 nm is possible, depending on the polarity and amplitude of applied voltage. The photocurrent spectra for samples with circular electrodes characterize two charge de-trapping peaks and the peak at 273 nm is also partially contributed by the photoelectrons from electrode.
Keywords:Photo-stimulated discharge  Space charge  Trap depth  Polypropylene  Photoemission
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