Used in research and development of luminescent materials, particularly in phosphors for lighting and display technologies. Exhibits interesting optical properties due to its f-electron configuration, making it suitable for doping in solid-state lasers and optical amplifiers. Also investigated for use in scintillation detectors for radiation measurement due to its ability to emit light when exposed to ionizing radiation. Plays a role in the synthesis of other terbium-containing compounds used in advanced electronic and photonic devices.