Tb2 Se1 O2

Tb₂SeO₂ is an oxychalcogenide semiconductor compound combining terbium, selenium, and oxygen—a rare earth-based material belonging to the mixed-anion semiconductor family. This is an experimental/research-phase compound with potential applications in optoelectronics and solid-state device physics; the rare earth terbium content and selenium's semiconducting character suggest interest in photonic materials, phosphors, or wide-bandgap device development where traditional semiconductors may not meet performance requirements.