Used as a precursor in the synthesis of terbium-containing luminescent materials, particularly in phosphors for fluorescent lamps, LED lighting, and display technologies. Its strong green emission under UV excitation makes it valuable in color conversion filters and optical sensors. Employed in research for doping into glass and ceramic matrices to enhance optical properties in laser and fiber-optic applications. Also utilized in the preparation of terbium oxide coatings and nanomaterials for advanced electronic and magnetic devices.