Aug 30, 2019
Brauer Hall, room 12
Dr. Rohan Mishra, Assistant Professor
Department of Mechanical Engineering & Materials Science
Washington University in St. Louis
Designing stable perovskites for energy applications one atom at a time
Abstract: Advances in first-principles calculations based on density-functional theory now make it possible to successfully describe the atomic-scale properties of "real" materials with defects and imperfections. Concurrent advances in scanning transmission electron microscopy enables imaging and spectroscopy of the atomic and electronic structure of materials with unprecedent spatial and energy resolution. Naturally then, the combination of theory and microscopy provides an unparalleled probe to unravel the structure-property correlations in real materials. In this presentation, I will discuss our efforts to design new functional materials based on the perovskite framework with engineered defects and imperfections for various energy applications. Examples will include design of: lead-halide perovskites with defects engineered to achieve stable optoelectronic properties; new lead-free perovskite semiconductors for use in solar cells, and defective oxides for cleaner combustion of hydrocarbons.
Organizer / Host: Dr. Marcus Foston