CuSeI

CuSeI is a ternary copper selenide iodide compound that combines copper, selenium, and iodine in a single crystalline phase. This material is primarily of research interest for semiconductor and optoelectronic applications, where mixed-halide and chalcogenide compounds are being explored for photovoltaic cells, photodetectors, and solid-state ionic conductors. While not yet established in mainstream industrial production, compounds in this family are notable for their tunable bandgap and potential for low-cost, solution-processable device fabrication compared to conventional silicon-based alternatives.