Low-Temperature, Solution-Based Synthesis of Luminescent Chalcogenide Perovskite BaZrS Nanoparticles.

Chalcogenide perovskites constitute a promising earth-abundant, non-toxic, and robust semiconductor family with the potential to compete with hybrid perovskites as high-quality photovoltaic absorbers. However, a low-temperature, solution-based synthesis route has eluded researchers in this area. Here we report the colloidal synthesis of chalcogenide perovskite BaZrS nanoparticles at 330 °C in organic solvent. The nanoparticles (10-20 nm) are found to be comprised of smaller (3-5 nm) crystalline domains. Promising optoelectronic properties for the nanoparticles are measured, with photoluminescence decay times as high as 4.7 ns.