Enhanced electronic transport properties in complementary binary discotic liquid crystal systems

The electronic transport properties of the molecular stacks in discotic liq uid crystals (DLCs), have generated much recent interest. In particular, am ong a certain class of these DLCs, the triphenylenes, some derivatives exhi bit high hole mobilities as demonstrated by the time of flight transit sign als obtained in transient photoconduction experiments. The stacks have also been shown to exhibit one-dimensional transport behaviour. If the DLCs are to find application as new electronic materials it is desirable to improve their electronic transport properties. In this paper we demonstrate that t he hole mobility and range are greatly increased as a result of the orderin g imposed in complementary binary mixtures formed by addition of a large co re discogen to the triphenylene molecules. (C) 2000 Elsevier Science B.V. A ll rights reserved.