Ga2CuSe4

Ga₂CuSe₄ is a ternary chalcogenide semiconductor compound combining gallium, copper, and selenium in a tetrahedral crystal structure. This material belongs to the family of I-III-VI₂ semiconductors and is primarily of research interest for optoelectronic and photovoltaic applications, particularly as a potential absorber layer in thin-film solar cells and as a material for studying semiconductor physics in the visible-to-infrared spectrum. Its notable advantages over binary semiconductors (like CdSe or GaAs) include tunable bandgap through compositional variation and the possibility of lower-cost production compared to gallium arsenide, though it remains largely in experimental development stages with limited commercial deployment.