TRANSIENT PHOTOCONDUCTIVITY IN A DISCOTIC HEXAGONAL PLASTIC CRYSTAL

Charge-carrier transport in organic materials is the fundamental phys ical process behind devices such as laser printers. Charge-carrier mob ility data are presented for hexabutyloxytriphenylene (H4T), which exh ibits an unusually high charge-carrier mobility, which can be traced t o the formation of a plastic discotic phase. The Figure shows the norm al discotic hexagonal texture with six-fold symmetry observed for H4T at 144 degrees C; this symmetry disappears at lower temperatures (see also the cover).