Transient photoconductivity in a discotic hexagonal plastic crystal


  • This work was supported by the Bundesministerium für Forschung und Technologie (03M4048A0) and the Fond der Chemischen Industrie. Some of the authors (B. G., A. K., J. H. W.) would like to acknowledge the financial support by the Deutsche Forschungsgemeinschaft (SFB 383). B. G. also gratefully acknowledges the support by the Fonds der Chemischen Industrie.


Charge-carrier transport in organic materials is the fundamental physical process behind devices such as laser printers. Charge-carrier mobility data are presented for hexabutyloxytriphenylene (H4T), which exhibits an unusually high charge-carrier mobility, which can be traced to the formation of a plastic discotic phase. The Figure shows the normal discotic hexagonal texture with six-fold symmetry observed for H4T at 144°C; this symmetry disappears at lower temperatures (see also the cover).

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