Ba2ErInSe5

Ba2ErInSe5 is a quaternary semiconductor compound containing barium, erbium, indium, and selenium, belonging to the family of rare-earth-containing chalcogenide semiconductors. This is a research-phase material studied for its potential in infrared optics and photonic applications, where the combination of rare-earth dopants and selenide hosts offers tunable bandgaps and luminescent properties. The material's primary appeal lies in specialized photonic and optoelectronic niches where rare-earth ion transitions enable mid-to-far infrared emission or detection, though it remains largely in the experimental phase without widespread industrial adoption.