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 result of our free relaxation experiments show a field and time dependent interface barrier of Richardson-Schottky type, which is active in a time domain up to 60s in a temperature range from -30 to 90 °C. This type of rectifying contact leads to contact electrification phenomena depending on the dc and superimposed ac voltage. Nonlinear dielectric properties can be discussed in terms of these results.