Surface potential decay characteristics and TSDC studies in corona charged kapton polyimide film

摘要

AbstractThe polarization mechanism due to corona discharge has been investigated in Kapton polyimide film by applying thermally stimulated discharge current technique. Three peaks were observed in TSC spectra. These peaks are attributed to the shallow and deep trap levels present in Kapton. Heat treatment causes a decrease in the peak current which may be due to the reduction in the number of traps. Iodine doping increases the peak current nearly ten times which may be due to the increase in number of carriers as a result of diffusion of I2ions in the polymer matrix. Studies of surface potential decay show that photo decay rate is much higher than dark decay rate. Heat treatment and iodine doping increase the dark decay rate.