Co2 Se2

Co₂Se₂ is a cobalt selenide compound belonging to the family of binary transition metal chalcogenides, which are semiconducting materials with layered crystal structures. This material is primarily of research and developmental interest for optoelectronic and energy conversion applications, where its direct bandgap and tunable electronic properties make it attractive for photovoltaic devices, photodetectors, and thermoelectric systems. Engineers consider cobalt selenides as alternatives to more mature semiconductors when seeking materials with enhanced light absorption, reduced toxicity compared to certain cadmium-based compounds, or integration into van der Waals heterostructure devices.