Monolayer films of a substituted silicon phthalocyanine

Abstract

This paper describes the preparation and properties of Langmuir-Blodgett films of tetra-4-tert-butyl phthalocyaninatosilicon dichloride (ttb PcSiCl₂). Our experiments indicate the relative ease with which films of this material can be prepared compared with similarly substituted compounds. All the isotherm, optical and electrical data are consistent with the molecules being stacked edge-on to the substrate with the molecular faces having a preferred orientation perpendicular to the dipping direction. The uniformity of the films is reflected in their ability to sustain high electric fields; their electrical resistivity perpendicular to the substrate is approximately 5 × 10⁵Ωcm.