Hybrid organic-inorganic perovskite (HOIP) semiconductors based on metal halide frameworks offer unprecedented opportunity to tailor structural and materials properties using the full flexibility afforded by the associated inorganic and organic components, and such tunability offers wide-ranging potential for applications including solar cells, light-emitting devices, detectors, transistors and advanced computing devices. In this talk we will focus on examining the role that the organic cation can play in introducing structural distortion and chirality into the inorganic framework, and the associated impacts on, for example, chiroptical (e.g., circularly polarized absorption and chirality-induced spin selectivity), electronic structure (e.g., spin splitting of the conduction band) and thermal properties (e.g., access to a low-melting temperature and stabilization of a glassy state). The above examples point to the great potential of using structural distortions and chirality for control over light, charge and spin within the wide-ranging HOIP family.
David Mitzi is the Simon Family Distinguished Professor at Duke University, with appointments to the Departments of Mechanical Engineering and Materials Science and Chemistry. He received his B.S. in Electrical Engineering and Engineering Physics from Princeton University (1985) and his Ph.D. in Applied Physics from Stanford University (1990). Prior to joining the faculty at Duke (2014), Dr. Mitzi spent 23 years at IBM’s Watson Research Center, where his focus was on the search for and application of new electronic materials, including organic-inorganic perovskites and inorganic materials for photovoltaic, LED, transistor and memory applications. He also served as manager for the Photovoltaic Science and Technology Department, where he initiated/managed a multi-company program to develop a low-cost, high-throughput approach to deposit thin-film chalcogenide-based absorbers for high-efficiency photovoltaics.