Used as a precursor in the synthesis of terbium-containing materials for luminescent applications, such as in phosphors for LED lighting and display technologies. Its optical properties make it suitable for doping in solid-state lasers and optical amplifiers. Also employed in research for developing luminescent sensors and bioimaging probes due to terbium’s strong green emission under UV excitation. Additionally, it serves as a catalyst or reagent in certain organic reactions and coordination chemistry studies.