Abstract
Organic transistor characteristics of single-crystal phase pentacene were investigated. Ionic liquids (ILs) were used as not only a gate dielectric material in the transistors but also a crystallization solvent in vacuum deposition of pentacene. The crystal sizes reached 200 μm and their surface exhibits a molecularly step-and-terrace structure. There was no sign of IL molecules inside the crystal, and the impurity level of 6,13-pentacenequinone was also reduced. The average value of the field-effect mobility was not so inferior to those for the conventional pentacene single crystals, and the highest value exceeded 5 cm 2/Vs, with the on/off current ratio of 10 4.
Original language | English |
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Article number | 083303 |
Journal | Applied Physics Letters |
Volume | 101 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2012 Aug 20 |
Externally published | Yes |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)