Stefano Toso, Istituto Italiano di Tecnologia
Lead Chalcohalides Nanocrystals and Chalcohalide-Perovskite Heterostructures
Written by Senam Tamakloe
Chalcohalides are considered promising candidates for the next generation of photocatalysis and photovoltaic applications. The chalcohalide compounds, formed by one or more metals, a halide, and a chalcogenide, can offer different structures and properties. Despite widespread studies, lead chalcohalides are an example of less understood nanocrystals (NC) in terms of stochiometry and optoelectronic properties. Stefano Toso and his colleagues addressed this in their studies. Toso outlined a phase-selective synthesis approach that yielded two novel lead sulfochloride materials (Pb3S2Cl2 and Pb4S3Cl2). The synthesis of these two different yet competitive products relied on the formation of an intermediate heterostructure. The findings in this talk signify significant progress in understanding the directional design of novel nanomaterial synthesis.