Effect of Injecting Electrodes on TSD Behaviour of Vacuum Deposited PVF Films

摘要

Depolarization behaviour of vacuum deposited polyvinyl fluoride (PVF) films has been studied as a function of nature of the electrode materials used during polarization such as copper,silver,aluminium and indium using the thermally stimulated discharge current (TSD) technique.TSD spectra of these films show a single relaxation peak centered around 430+-1 K with activation energies of approx0.65 eV.The peak current and the charge associated with the relaxation peak depend strongly on the electrode material used.This has been attributed to the electrode-polymer interface barrier controlling the injection of the charge carriers into PVF films that results into space charge effects by subsequent trapping of the injected charge carriers at macroscopic distances.