2b02 The mesomorphic property and charge carrier mobility of binary mixtures of symmetric and asymmetric dialkylthienylnaphthalene

Abstract

A mixtures of asymmetric and symmetric di(5'-octyl-2'-thienyl)naphthalene (8TNAT8) were studied on charge carrier mobility correlated to the mesomorphism. Mixtures of 2,7- and 2,6-8TNAT8 exhibit a highly ordered smectic mesophase. The introduction of asymmetric alkylthieno groups on naphthalene core part leads to the increase of dissolution into organic solvents during disappearance of mesophase in comparison to symmetric one. TOF measurements of carrier mobility were carried out. The observed mobility for positive carriers is 0.8〜1×10^-1cm² V^-1 s^-1 in the mesophase.