Enhanced electronic transport properties in complementary binary discotic liquid crystal systems Original Research Article

The electronic transport properties of the molecular stacks in discotic liquid crystals (DLCs), have generated much recent interest. In particular, among a certain class of these DLCs, the triphenylenes, some derivatives exhibit high hole mobilities as demonstrated by the time of flight transit signals 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 the hole mobility and range are greatly increased as a result of the ordering imposed in complementary binary mixtures formed by addition of a large core discogen to the triphenylene molecules.