2003•Molecular Crystals and Liquid CrystalsRequires access
Discotic Liquid Crystalline Semiconductors
Kazuchika Ohta, Kazuaki Hatsusaka, Makiko Sugibayashi, Masahiro Ariyoshi, Kazue Ban, Fumihiro Maeda, Rie Naito, Kaori Nishizawa, A.M. van de Craats, John M. Warman
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Abstract
Our works on discotic liquid crystalline semiconductors are reviewed. Some of them show very fast carrier mobilities. Novel sandwich rare earth metal complex, bis[octakis(alkylthio)phthalocyaninato]lutetium(III), shows a mobility of 0.71 cm 2 /Vs, which is the fastest in liquid crystals at the present time, so far as we know. It was also found that novel octaphenoxy- and/or hexaphenoxy-substituted phthalocyanine-based discotic liquid crystals exhibit spontaneous perfect homeotropic alignment in the tetragonal columnar mesophase. The corresponding polymer films showing the perfect homeotropic alignment at room temperature could be successfully prepared. Such marvelous films can be practically utilized as organic carrier transport materials and solar batteries.