Growth and electrical properties of high purity organic molecular crystals

High charge carrier mobilities, approaching those of silicon at room temperature, and pronounced nonlinear (subohmic) conductivities were discovered. An overview will be given on those crystal growth methods which are most suitable - while maintaining the high purity of ultrapurified starting material - to yield highly perfect single crystals (Bridgman, sublimation, and Czochralski growth. With respect to potential future applications of organic crystals in electronics and optoelectronics it appears necessary, however, to approach smaller geometrical dimensions in epitaxial layers and microstructures.