Presentation description

Chiral organic-inorganic metal halide two-dimensional perovskites have recently emerged as an exciting material with pronounced chiroptical properties due to their highly tunable molecular structure. Perovskites have a centrosymmetric structure, meaning they cannot naturally be chiral unless it is induced. While many studies focus on the direct integration of chirality in two-dimensional perovskites by introducing chiral and polar molecules to the organic cation layer of the perovskite, there are limitations on what materials you can use due to the relationship between the structure and size of the molecules. Methods involving chirality transfer by introducing a proximal chiral additive and disorienting the inorganic layer have shown promising potential for their integration into next-generation chiroptical technologies such as spintronics, circularly polarized light (CPL) devices, and biosensors, as these chiral molecules "transfer" their handedness remotely to the achiral perovskite, inducing a chiral behavior. In this study, we focus on introducing chiral dopants to lead-based perovskites to create reconfigurable and low-cost chiral optoelectronic devices, eliminating the need for magnetic contacts or cryogenic temperatures.

Although these materials are promising alternatives to current chiroptical technologies, several obstacles exist that prevent the commercialization of chiral-induced metal halide perovskites, including a limited understanding of the perovskite's structural properties and defining its optical characteristics when a chiral dopant is introduced. Optimizing aspects of chiral-induced metal halide perovskites by studying the behaviors of various chiral dopants and concentrations can enhance our understanding and ability to implement these materials in next-generation technologies, such as displays and sensors. We can test the perovskite's properties through Circular Dichroism (CD), X-ray Diffraction (XRD), and Photoluminescence (PL).