THE TEMPERATURE-DEPENDENCE OF CONDUCTIVITY ANISOTROPY IN INTERMEDIATELY DOPED POLYACETYLENE

The temperature dependence of electrical conductivity and conductivity anisotropy of FeCl3 doped stretch-oriented polyacetylene film at diff erent doping levels were measured by using Montgomery technique. The i ncrease of conductivity anisotropy upon doping is related to the align ed fibrillar structure and the interfibrillar contact effect. Weak tem perature dependence, the slight decrease at low temperature and the pe rsistence of anisotropy through aging indicate that the interfibrillar contact barriers limit the quasi-one-dimensional charge transport in heavily doped polyacetylene and play a major role in the conductivity anisotropy.