Electron injection at PVDF/metal interfaces

Electron injection and space charge relaxation are important time domain properties at PVDF/metal interfaces which can be investigated by free relaxation and AC-experiments as well as by contact electrification. The results of our free relaxation experiments show a field and time dependent interface barrier of Richard-son-Schottky type, which is active in a time domain up to 30 s in a temperature range from −40 to 90 °C. This type of rectifying contact leads to contact electrification phenomena depending on superimposed AC-voltage. Nonlinear dielectric properties can be discussed in terms of these results.