Field Effect Studies on Rubrene and Impurities of Rubrene
datasetposted on 24.01.2006, 00:00 by Roswitha Zeis, Celine Besnard, Theo Siegrist, Carl Schlockermann, Xiaoliu Chi, Christian Kloc
Rubrene single crystals have been grown by a vapor-phase process. Two additional compounds that contaminate rubrene have been identified and their structures determined. Single crystals of rubrene show excellent crystallinity and very small rocking curve width. Field effect transistors based on pure rubrene single crystals with colloidal graphite electrodes and Parylene as a dielectric demonstrate a maximal mobility of 13 cm2/Vs with strong anisotropy. The mobility increases very slightly with cooling, but decreases significantly at low temperatures.