In1.05Cu0.95Se2.05

In₁.₀₅Cu₀.₉₅Se₂.₀₅ is a ternary semiconductor compound belonging to the indium–copper–selenide family, with a nominal composition near the In–Cu–Se ternary phase diagram. This material is primarily of research and development interest rather than established in high-volume production; it belongs to the broader class of I–III–VI semiconductors that show promise for thin-film photovoltaic and optoelectronic applications. The slight nonstoichiometry (In-rich, Cu-deficient relative to ideal InCuSe₂) influences defect chemistry and electronic properties, making it relevant for absorber layers or buffer materials in next-generation solar cells and photodetectors where tunable bandgap and low-cost solution processing are advantageous.