Chiral Molecules in Action: Chemistry of Chiral Perovskite and Perovskite-Inspired Materials

The emergence of chiral metal halides marks a pivotal advancement in materials science, where structural asymmetry enables unprecedented control over spin-selective transport and polarized light interactions for optoelectronic and spintronic technologies. The introduction of chiral ligands into the metal halide lattice or on the surface of NCs imparts chirality to the corresponding hybrid materials, which adapts the handedness (R or S) of the chiral molecule. The choice of chiral molecule and metal halide type critically influences the crystal structure and dimensionality of metal halide crystals and thus their properties. Despite significant progress, the relationship between structure and chiroptical efficiency remains unclear. Nonetheless, they show great promise for spin filtering, enabling the fabrication of chiral LEDs and photodetectors. Considering these advancements, this Perspective focuses on the chiral-ligand-assisted design, synthesis, and functional exploration of chiral metal halide bulk and nanocrystals, along with the outstanding challenges that need to be addressed in the future.