"Modeling Photoactive Organic Materials"
See more of Dr. Fredin's research on her website: Fredin Group
Abstract: Chemical intuition is well developed for single molecules but the extent to which disorder in solid state molecular materials contributes to their properties is poorly understood. In particular, molecular materials move charges in some directions much more efficiently than others due to the packing of the molecules. Noncovalent interactions between the molecular components mean that dynamic disorder in these materials can have a large impact on the electronic properties of these materials at room temperature. This work explores how packing and vibrations in organic crystals affect charge transport in light driven devices. In particular, the size of dynamic disorder due to phonons or electronic excitation of molecules in the crystal is predicted for well-ordered high-mobility single crystals.
Bio: Lisa A. Fredin (Fred+Dean) is an Assistant Professor of Chemistry at Lehigh University. Her research draws on her background combining experiment and theory to develop computational and theoretical models of fundamental electronic properties to design materials with targeted properties. The Fredin group develops models of the chemistry and physics of a broad range of disordered materials, bridging physical chemistry, material science, nanoscience, and computation; as well as, probing the boundaries of the particle and wave approximations of electrons in materials.
Prof. Fredin earned a doctorate in chemistry at Northwestern University, and a bachelor’s in chemistry, biochemistry and applied mathematics (minor in computer science) at the University of Texas at Austin. Before coming to Lehigh, Fredin served as a research chemist at the National Institute of Standards and Technology in Gaithersburg, Maryland.
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