Investigation of the Optical and Electronic Properties of Crystalline Organic Materials

We have done extensive investigations of the optical and electronic properties of heterojunctions containing crystalline organic semiconductors. Using the new, ultrahigh vacuum process of organic molecular beam deposition (OMBD), we have grown heterojunctions consisting of organic semiconductors in contact with other organic semiconductors, as well as with inorganic semiconductors. Multiple quantum well structures consisting of two dissimilar organic semiconductors have been grown for the first time, and these structures show evidence for quantum confinement of excitons. Detailed studies of the optical and electronic properties of all heterojunction types are discussed in this report, which is taken from the thesis entitled, 'Growth and Characterization of Heterojunctions and Multiple Quantum Well Structures Based on Crystalline Organic Semiconductors' by F. F. So, University of Southern California, 1991.