Cu3SnS4

Cu3SnS4 is a quaternary semiconductor compound. It is also known by its mineral name, stannite. This compound crystallizes in the tetragonal system and belongs to the tetrahedral family of compounds. Its crystal structure is related to the chalcopyrite structure. The material is composed of copper, tin, and sulfur in a 3:1:4 atomic ratio. Cu3SnS4 exhibits semiconducting properties with a band gap typically in the range of 1.0 to 1.3 eV, depending on synthesis and measurement conditions. This band gap energy makes it a potential candidate for photovoltaic applications, particularly in thin-film solar cells, due to its absorption in the visible spectrum.

The synthesis of Cu3SnS4 can be achieved through various methods, including solid-state reactions, chemical vapor deposition, and solution-based techniques like solvothermal synthesis. The electrical and optical properties of Cu3SnS4 are influenced by its stoichiometry and crystalline quality. It is known to exhibit p-type conductivity. Research has explored its use not only in solar cells but also in thermoelectric devices and as a catalyst. The stability of Cu3SnS4 under different environmental conditions is an important factor for its practical applications.