Mobility Dependence on Electric Field in Low Density Polyethylene (LDPE)

Abstract

The surface potential decay evolutions with time after negative corona discharge of low-density polyethylene (LDPE) have been recorded for different charging levels. It was observed that there was a significant increase in the surface potential decay rate with the increase of charging levels. Electrical conduction characteristics in LDPE have been investigated as a function of electric fields strength. It is found that the mobility of LDPE increases with the increase of electric field and the conduction mechanism is governed by the hopping process of injected carriers between localized trapping centers. A deep trap separation of 3.2 nm, corresponding to 3.1019 traps/cm3 has been found.