Beyond lead halide perovskites nanocrystals

Abstract

Metal halides perovskites with nanoscale geometries have revolutionized the field of solution-processed photovoltaics and light-emitting devices due to their strong absorption and exceptional photoluminescence properties combined with a remarkable tolerance to structural defects. However, the further development of these materials to practical commercialization is hindered by their toxic components like lead and their inherent structural lability. Moreover, at a fundamental level, we still have little understanding of their crystallographic structures, chemical and physical interactions, and surface chemistry. So far, lead-free alternatives have been explored using double perovskites or replacement of Pb with more benign metals but without reaching the performance of their lead-analogs.

What is next in the halide perovskite nanocrystals field? Can Sn successfully replace Pb? How can we further engineer novel colloidal nanocrystals?