Electrical conductivity and optical reflectance of potassium-intercalated graphitized poly(<i>p</i>-phenylene vinylene) films

Abstract

Potassium and sodium have been successfully intercalated into heat-treated poly(p-phenylene vinylene) films. Metallic characteristics were observed in these potassium-intercalated films by the measurements of the electrical conductivity and optical reflectance. The stage dependency of conductivity and other properties observed in these films are consistent with potassium-intercalated graphite as in highly oriented pyrolytic graphite. Sodium-intercalated film, which is very dilutely intercalated, also shows high electrical conductivity comparable to those of concentrated K-intercalated films and metallic temperature dependence.