Low-Temperature, Solution-Based Synthesis of Luminescent Chalcogenide Perovskite BaZrS3 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 BaZrS₃ 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.