A new highly conductive BO-(MeO)2 TCNQ Langmuir-Blodgett film

A stable, highly conductive Langmuir-Blodgett (LB) film was developed with a charge-transfer (CT) complex of bisethylenedioxytetrathiaful valene (BO) and dimethoxytetracyanoquinodimethane using the unique nature of BO molecules. The metallic temperature dependence of electrical conductivity was observed down to 180 K, showing a maximum of 13 S/cm. The X-ray diffraction measurements show the presence of three kinds of domains corresponding to CT complex, icosanoic acid and disordered CT complex regions. The behavior of macroscopic electrical conductivity is understood well by a percolation model consisting of metallic, semiconducting and insulating sites.