On the dynamics of space charge regions in organic materials

Electrical conductivity phenomena has been studied in cyano-alkylbiphenyl m aterials as well as noncrosslinked epoxide adhesives. Measurements were don e under DC as well as AC voltage excitation. These were comprising frequenc y range 10(-5) divided by 10(4) Hz or equivalent time interval and were car ried for low voltage signals. Blocking electrodes were used and thick sampl es. It is assumed that sample response observed in indicated above frequenc y region is due heterocharge formation at the interface. Sample dielectric response observed in this case is assumed to be due to heterocharge formati on. It may be observed at DC voltage excitation, mainly. The response is si milar to that produced by so called CPA element.