BaSrO2S

BaSrO₂S is a mixed barium-strontium oxysulfide ceramic compound that combines metal oxide and sulfide phases, belonging to the family of rare-earth-free luminescent and photocatalytic materials. This material is primarily investigated for photocatalytic applications in environmental remediation and energy conversion, where its band structure enables visible-light activity for water splitting and pollutant degradation; it is also explored as a phosphor precursor and in solid-state chemistry research as a potential alternative to more toxic or rare-earth-dependent systems.