Chalcogenide perovskites (CPs), with the general composition
ABX3, where A and B are metals and X = S and Se, have recently
emerged as promising materials for application in photovoltaics. However,
the development of CPs and their applications has been hindered by
the limitations of available preparation methods. Here we present
a new approach for the synthesis of CPs, based on the sulfurization
of ternary and binary oxides or carbonates with in situ formed boron
sulfides. In contrast to the previously described approaches, the
method presented here uses chemically stable starting materials and
yields pure-phase crystalline CPs within several hours, under low
hazard conditions. CP yields over 95% are obtained at temperatures
as low as 600 °C. The generality of the approach is demonstrated
by the preparation of CPs with compositions BaZrS3, β-SrZrS3, BaHfS3, SrHfS3, and EuHfS3. Mechanistic insights about the formation of CPs are discussed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.