FABRICATION OF ELECTRICALLY CONDUCTIVE LANGMUIR-BLODGETT-FILMS COMPRISED OF POLY(3-HEXYLTHIOPHENE) AND NICKEL TETRA-TERT-BUTYL PHTHALOCYANINE

Langmuir-Blodgett monolayer and multilayer thin films were formed from nickel tetra-tert-butyl phthalocyanine and mixtures of this molecule with poly(3-hexylthiophene). In the mixed system, the phthalocyanine molecules serve as both a surface active agent to promote spreading and an electroactive material. The phthalocyanine rings exhibited a tendency to be stacked in one-dimensional arrays and oriented essentially perpendicular to the substrate, while the poly(3-hexylthiophene) molecules were found to be oriented nearly parallel to the substrate. The multilayer films of this system were rendered electrically conductive by doping with I2 or SbCl5. Conductivities in the range of 10(-2) - 10(-3) S cm-1 were observed in films containing a 5:1 mole ratio of poly(3-hexylthiophene) to phthalocyanine.