AC ELECTRICAL-PROPERTIES OF AU CLALPC/AU DEVICE/

The a.c. electrical properties of chloro aluminum phthalocyanine (CIAI Pc) thin film sandwiched between two gold (Au) electrodes have been st udied in the frequency range 10 Hz to 100 kHz and the temperature rang e 293 K to 400 K. The a.c. conductivity sigma(omega) was found to vary as omega(s), with the index s < 1, indicating that a hopping process of conduction is dominant at low temperatures and higher frequencies. At higher temperatures and lower frequencies a free carrier conduction mechanism is likely to dominate. At low temperatures the capacitance of the Au-CIAIPc-Au device is temperature-insensitive and increases ra pid ly above 300 K. The capacitance and loss tangent decreased with f requency and increased with temperature. Such characteristics were fou nd to be in good agreement with the devices Au/CuPc/Au and Au/PbPc/Au.