Publication date: 28th August 2024
Halide perovskite semiconductors can merge the highly efficient operational principles of conventional inorganic semiconductors with the low‑temperature solution processability of emerging organic and hybrid materials, offering a promising route towards cheaply generating electricity as well as light. Following a surge of interest in this class of materials, research on halide perovskite nanocrystals (NCs) has gathered momentum in the last decade. This talk will highlight several findings of our group on their synthesis, for example our recent study on the influence of various exogenous cations and acid-based equilibria on the growth of NCs, and the preparation of NCs in the strong quantum confinement regime. Our group is pioneering syntheses of NC heterostructures in which a perovskite domain is interfaced either with a metal chalcogenide or a chalcohalide. This talk will discuss how we can computationally predict the feasibility of such heterostructures, based on interfacial matching. We will also overview selective anion/cation exchange reactions that can take place on a starting heterostructure, from which a series of second-generation heterostructures can be generated.