New Phenomena in High Mobility Organic Semiconductors

Abstract

Field-effect devices on the basis of high-quality molecular single crystals have been used to study charge transport properties of two-dimensional electron and hole systems in organic semiconductor materials. The improvement of crystalline quality and purity leads to the observation of a variety of new phenomena in these materials, such as the quantum Hall effect, ballistic charge transport, or superconductivity, which are summarized in this article.

Structure and intermolecular potentials in molecular crystals

“…The modern microscopic view of the physicochemical behaviour of matter proceeds on the assumption that bulk properties are determined by molecular and intermolecular properties (see Schoen (2001) for semiconductors, Dietz et al (2001), Datta and Misra (1999) for magnetic properties, Munn et al (2001) for electric properties). Ideally, one would like to start from the simple chemical connectivity of an organic compound and to proceed to a prediction of the mechanical, optical, electrical, and magnetic properties in all of its condensed states through a sequence of simulation steps.…”

High performance of rubrene thin film transistor by weak epitaxy growth method

“…Recently, organic thin film devices showed rapid development, which injected more vitality for their application due to their much better device performance than amorphous silicon [7]. To achieve better device performance, the improvement of organic film quality usually plays a vital role [8][9][10].…”

Two-dimensional superconductivity with strong spin-orbit interaction

“…(see also references cited in [8]) An examination of the list of superconductors in Table 6.1 of [9] shows that, e.g., Mo 3 Al 2 C (symmetry P 4 1 32), La 5 B 2 C 6 (symmetry P 4) and Mo 3 P (symmetry I4) are all without inversion centers. Furthermore, two-dimensional (2d) surface superconductivities have been induced by gate electric potentials in C 60 and some molecular crystals in the field-effect-transistor geometry [10,11].…”