Abstract:
Over the last decade, metal halide perovskite crystals and their derivatives, in the form of nano and bulk crystals, have emerged as a promising class of semiconductor materials with many interesting linear and nonlinear optical properties. The light emission of lead halide perovskite nanocrystals (LHP NCs) is not only tunable by their dimensions and composition but also through self-assembly into ordered architectures. In addition, the optical properties of LHP NCs are highly sensitive to surface traps, which are controllable by proper ligand engineering. On the other hand, low-dimensional metal halide crystals with chiral ligands exhibit chiroptical properties, a field that is being intensively studied. The first part of my talk will be focused on the latest developments in surface engineering of CsPbCl3 NCs, which are highly defect-intolerant, unlike bromide- and iodide-based LHP NCs. In the second part, different strategies for achieving polarized absorption and emission from metal halide bulk and nanocrystals, either by self-assembly of NCs or helical structural engineering, will be discussed.
References:
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