ErSe

Erbium selenide (ErSe) is a rare-earth ceramic compound belonging to the lanthanide chalcogenide family, typically studied as a narrow-bandgap semiconductor or optoelectronic material. While primarily a research material rather than a widely commercialized engineering ceramic, ErSe is investigated for infrared optics, photonic devices, and potentially for thermoelectric applications due to its rare-earth electronic structure. Engineers would consider this material for specialized high-performance applications requiring infrared transparency or unique electronic properties where cost and processing complexity are secondary to functional performance.