Charge trapping levels in vacuum deposited poly (vinylidene fluoridechlorotrifluoroethylene) copolymer thin films

Thermally stimulated discharge current (TSD) behaviour of vacuum deposited polyvinylidene fluoride-chlorotrifluoroethylene copolymer films (~ 10000 A) has been studied as a function of polarization field (1.0 x 10
³
- 2.0 x 10
⁴
V/cm). The TSD spectra of these films show a single relaxation peak whose charge and peak current vary non-linearly with the polarization field. The origin of the relaxation peak has been attributed to the migration of the charge carriers, injected from the electrodes, at the macroscopic distances and their subsequent trapping at energy levels lying ~ 0.48 eV.