Special Seminar
Name: Arundhati Deshmukh
Affiliation: Postdoctoral Scholar, Stanford University
Title: Tuning excitonic properties with molecular building blocks
Date & Time: Tuesday, 21st January 2025 at 09:00 a.m.
Venue: Through Microsoft Team
Abstract:
In this talk, I will show how exotic material properties can be realized and chemically tuned through long-range interactions within extended architectures. Excitonically coupled chromophore aggregates exhibit drastically shifted photophysical properties (such as absorption and emission wavelengths, quantum yields) as compared to their monomeric counterparts. The long-range excitonic couplings and the resulting photophysical properties are dependent on the molecular packing arrangements, morphology and disorder within the extended aggregates. I will start this talk with a discussion of my PhD work on using molecular aggregation to avail strong and tunable absorptions and emission across the visible and shortwave infrared (1000 – 2000 nm) regions. Next, I will discuss my postdoctoral work on layered perovskite heterostructures where a variety of low-dimensional inorganic lattices can be intergrown with 2D halide perovskites as bulk single-crystals. Building on this approach, I will show how the solution self-assembled perovskite heterostructures can be designed to show interesting band structures and excitonic properties, in analogy to the well-known van der Waals heterostructures.