Electrical and optical properties of highly conducting charge-transfer complexes of poly(p-phenylene)

Electrical conductivity, Hall effectm and spectroscopic measurements have been made on AsF₅-doped poly(p-phenylene). Doping increases the conductivity of the parent polymer by as much as 14 orders of magnitude to values as high as 5 × 10⁴ S/m. Hall effect measurements indicate p-type conduction with a Hall mobility approaching 10^?4 m²/V s for doping levels between 0.24 and 0.42 moles of AsF₅ per mole of monomer. Doping with an electron donor, K, has increased the conductivity to about 10³ S/m for a doping level of 0.57 moles of K per mole of monomer. Using this conductivity value, with the assumption of total charge transfer from the donor, suggests a drift mobility for electrons which is significantly less than that for holes. The assumption of an intercalant structure analogous to that of polyacetylene and graphite leads to the conclusion that the presently achieved AsF₅-doping levels in poly(p-phenylene) correspond to a compound which is not wholly stage 1.