O6 Ba2 Ta1 Bi1

Ba₂TaBiO₆ is an experimental complex oxide semiconductor belonging to the double perovskite family, combining barium, tantalum, and bismuth in a layered crystal structure. This compound is primarily of research interest for photocatalytic and optoelectronic applications, where its bandgap and electronic structure are being evaluated for potential use in visible-light-driven catalysis, photovoltaics, or radiation detection. The material represents an emerging class of lead-free halide alternatives being explored to address toxicity and stability concerns in next-generation semiconductor devices, though it remains largely in the laboratory development stage rather than commercial production.