ABSTRACT

Abstract Since the fi rst discovery of an organic superconductor in 1980, TMTSF2PF6 (TMTSF = tetramethyltetraselenafulvalene) with the superconducting (SC) transition temperature (Tc) = 0.9 K under 12 kbar, approximately 144 organic superconductors have been found. Among them, the highest Tc of the two-dimensional (2D) sulfur-based organic superconductors is 14.2 K under 82 kbar for β′-(BEDT-TTF)2ICl2 (BEDT-TTF = bis(ethylenedithio)tetrathiafu lvalene) and 3D C60-based superconductor is 33 K for Cs2RbC60. In this chapter, the development, crystal growth, and the characteristic features of pseudo-1D, 2D, and 3D molecular superconductors are introduced.